Question

a)(1+X)(1-X)-(1+X)^2
b)(3y+5)^2-9X^2
c)(2x-1)^2+X (3x-3)

Urgente pfvrr

Answer 1

a)(1+x)(1-x)-(1+x)²  Lembre-se que (a+b)(a-b)=(a²-b²) e (a+b)² = (a²+2ab+b²)

(1-x²)-(1+2x+x²)

1-x²-1-2x-x²=-2x²-2x

b)(3y+5)²-9x²

9y²+30y+25-9x²=30y+25

c)(2x-1)²+x(3x-3)

4x²-4x+1+3x²-3x

7x²-7x+1