`(5-x).(5+x)`
`=5^2-x^2`
`=25-x^2`
Giải thích:
Áp dụng hằng đẳng thức:
`a^2-b^2=(a-b)(a+b).`
C1
`(5-x)(5+x)`
`=5(5+x)-x(5+x)`
`=25+5x-5x+x^2`
`=25+x^2`
____________________________
C2
`=(5)^2-x^2`
Hằng đẳng thức: `A^2-B^2=(A+B)(A-B)`
Phân tích cho mình biểu đồ này nha tháng có nhiệt độ cao nhất là tháng nào nhiệt độ là bao nhiêu tháng có nhiệt độ thấp nhất là tháng nào bao nhiêu độ tương tự với lượng mưa
.................................................50 điểm
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