Bài `1:`
`(x+6)^2=x^2+12x+36`
`(9+x)^2=81+18x+x^2`
`(3x+4)^2=9x^2+24x+16`
`(1x+3)^2=x^2+6x+9`
Bài `2:`
`(x-7)^2=x^2-14x+49`
`(6-x)^2=36-12x+x^2`
`(2x-5)^2=4x^2-20x+25`
`(3x-5y)^2=9x^2-30xy+25y^2`
Bài `3:`
`a// (x+4)(x+4)=(x+4)^2=x^2+8x+16`
`b// (8x-x)(8+x)=7x(8+x)=56x+7x^2`
`c// (2x+3)(2x-3)=4x^2-9`
`d// (5x-y)(5x+y)=25x^2-y^2`
kết quả theo thứ tự nha
bài 1:
\(x^2+12x+36\) \(81+18x+x^2\)
\(9x^2+24x+16\) \(1x^2+3x+9\)
bài 2:
\(x^2-14x+49\) \(36-16x+x^2\)
\(4x^2-20x+25\) \(9x^2-30xy+25y^2\)
bài 3:
\(A=x^2+8x+16\)
\(B=56x+7x^2\)
\(C=4x^2-9\)
\(D=25x^2-y^2\)