Question

Упростите вырожение: 1) (x+5)^2-5x(2-x) 2) 16y+2(y-4)^2

Answer 1

1)(x+5)²-5x(2-x)
x²+10x+25-10x-5x²
-4x²+25
2)16y+2(y-4)²
16y+2(y²-8y+16)
16y+2y²-16y+32
2y²+32

Answer 2

1. (x+5)^2-5x(2-x) = x^2 + 10x + 25 - 10x + 5x^2 = 6x^2 + 10x + 25

2. 16y+2(y-4)^2 = 16y+2(y^2 - 8y + 16) = 2y^2 - 16y + 32