$4x^2(x+y)-x-y$$=4x^2(x+y)-(x+y)$$=(x+y)(4x^2-1)$$=(x+y)(2x-1)(2x+1)$
Đáp án + Giải thích các bước giải:
`4x^2(x+y)-x-y`
`= 4x^2(x+y) - (x+y)`
`= (x+y)(4x^2-1)`
`= (x+y)[(2x)^2-1^2]`
Áp dụng hằng đẳng thức `A^2-B^2=(A-B)(A+B)` , ta được :
`= (x+y)(2x-1)(2x+1)`
Tặng quà 5 sao nha ! 1/ Cho tam giác $ABC$ vuông tại $A$ . Công thức tính $Py-ta-go.$ 2/ Cho tam giác $ABC$ vuông tại $B$ . Công thức tính $Py-ta-go.$ 3/ Cho tam giác $ABC$ vuông tại $C$ . Công thức tính $Py-ta-go$
Calli : " Anh đâu phải anh hùng " 🎶💖☺
Lm giúp mk vs mk cần gấp gấp lắm giúp mk vs các bn ơi trả đủ 5 vote +30 đ
Ước chung lớn nhất (12,90,84)
Giải hộ mk nhé: Thu gọn đa thức sau về dạng 1 tích (dạng hàng đẳng thức) 9x^2-16
Vẽ mều :Đ - Mình muốn hỏi là dạo này mình dễ ngủ quá, có cách nào để khó ngủ như trước đây không 👽
giúp e vs ạ e thật sự cần e cảm ơn ạ
V. Choose the incorrect underlined part in the following sentences. 1. You (A) have to (B) made sure that children (C) don't play outside alone. 2. You (A) mustn't (B) uses the motorbike without a driver's license. It's (C) against the law. 3. Drivers (A) haven't (B) to stop at (C) yellow traffic lights. 4. You (A) ought (B) to taking him (C) to the emergency room. 5. During the lesson, (A) does you (B) have (C) to listen to your teacher carefully and take notes quickly. 6. Students (A) don't have to (B) consume (C) food or drink in the class or in the library. 7. Get out of the grass! (A) You (B) must walk on the grass (C) here. 8. The baby (A) is sleeping. (B) You (C) don't have to shout. 9. Lien, we (A) must (B) are (C) quicker or we will miss the last train to Hai Phong city. 10. You (A) have to (B) feed the dog. (C) I've already fed it
Family Rules Would you like to have a boss who didn't specify what the rules were in your work place but punished you if you broke these unknown rules? You would feel pretty frustrated, wouldn't you? That's how children feel when they are punished for breaking rules that have never been explained to them. Family rules are necessary to make clear what is expected of children and to outline punishments for misbehavior and rewards for good behavior. When creating a list of family rules remember to be specific both in what is expected and the punishment or reward. Gather the family together when creating the list of family rules. Involve children in the creation of the rules and get their input as to appropriate rewards or punishments. Explain to children why youd like to include certain rules. They'll accept them more if they understand that they are for their own benefit and safety. You can create the list of rules in the form of a contract which all family members sign. Before completing the contract make sure that all family members are in agreement as to the wording of the rules and the punishments or rewards for each rule. Once the rules have been created, remember to be consistent with their enforcement. The list of rules doesn't mean anything unless it is consistently enforced. 1. Why do we need a list of family rules? 2. Why should we explain to children the reason behind the rules? 3. Who should sign the family rules contract? 4. What could happen if you don't consistently enforce the rules?
Phân tích đa thức thành nhân tử (dạng 3) x^2+ax^2-y-a+cx^2-cy *giúp mik với mng* đang cần gấp á
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