Question

calcule os polinominos

a)(5x-1)*(5x+1)
b)(a+b)*(a+b)
c)(2x²- 3x)*(5x-2)
d)(x+2)*(x+2)

Answer 1

.a)
$25x {}^{2} + 5x - 5x - 1 = 25x {}^{2} - 1$
b)
$(a + b) {}^{2} = a {}^{2} + 2ab + b {}^{2}$
c)
$10x {}^{3} - 4x {}^{2} - 15x {}^{2} + 6x = 10x {}^{3} - 19x {}^{2} + 6x$
d)
$(x + 2) {}^{2} = x {}^{2} + 4x + 4$