Question

решить - раскрыть по формуле (a+b)^2=a^2+2ab+b^2

(x-3)^2=

(y+5)^2=

(2x-1)^2=

(x+2)^2=

(x-4)^2=

Answer 1

1) x^2 -6x+9.

2)y^2+10y+25.

3)4X^2-4X+1.

4)X^2+4X+4.

5) X^2-16X+16

Answer 2

(x-3)^2=x^2-2*3*x+(-3)^2=x^2-6x+9

(y+5)^2=y^2+2*5*y+5^2=y^2+10y+25

(2x-1)^2=(2x)^2-2*2x*1+(-1)^2=4x^2-4x+1

(x+2)^2=x^2+2*2*x+2^2=x^2+4x+4

(x-4)^2=x^2-2*4*x+(-4)^2=x^2-8x+16