`(x+5)^2=(x+5)(x-5)`
`<=>(x+5)^2=x^2-25`
`<=>x^2+10x+25-x^2+25=0`
`<=>10x+50=0`
`<=>10x=-50`
`<=>x=-5`
Vậy: `S={-5}`
Đáp án:
Giải thích các bước giải: đây nha
mik sắp nộp r, cần gấppppppp
Giải phương trình giúp em với ạ
Help part 2:(((((((((((((((((((((((((
Tính hợp lí A = (2+7+12+...+497):50 B = 2021-2020+2019-2018+...+3–2+1
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mấy bạn làm giúp mình nha, mình đang cần gấp..
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