Question

Se A= x²+1 e B= -2x²+x+2 determine o valor de:

a) -2A+3B

Answer 1

A = x² + 1
-2A =
-2(x² + 1) =
-2x² - 2

B = -2x² + x + 2
3B = 
3(-2x² + x + 2) =
-6x² + 3x + 6

-2A + 3B =
-2x² - 2 - 6x² + 3x + 6 =
-8x² + 3x + 4