Question

токо 1
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Answer 1

$1.a)(a-6)^2=a^2-2*6a+6^2=a^2-12a+36;$
$2.b)(x+7)^2=x^2+2*7x+7^2=x^2+14x+49;$
$3.c)(-3+x)^2=(-3)^2+2*(-3)*x+x^2=9-6x+x^2;$
$3.d)(0,2x-3)(0,2x+3)=(0,2x)^2-3^2=0,04x^2-9;$
$3.e)(0,4y-0,5)^2=(0,4y)^2-2*0,4y*0,5+(0,5)^2=0,16y^2-0,4y+0,25;$
$3.f)(-a-1)^2=(a+1)^2=a^2+2a+1^2=a^2+2a+1.$