Toán Lớp 8: rút gọn
A=(x+4)^2+(x-4)^2
B=(x-3)(x+3)^2
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Toán Lớp 8: rút gọn
A=(x+4)^2+(x-4)^2
B=(x-3)(x+3)^2
Comments ( 2 )
$A=(x+4)^2+(x-4)^2$
$A=x^2+8x+16+x^2-8x+16$
$A=2x^2+32$
————————-
$B=(x^2-9)(x+3)$
$B=x^3+3x^2-9x-27$