Question

Find A-2B if A=2x²+4x+3and B=5x²+3

Answer 1

Step-by-step explanation:

$a = 2 {x}^{2} + 4x + 3 \\ b = 5 {x}^{2} + 3 \\ a - 2b = \\ 2 {x}^{2} + 4x + 3 - 2(5 {x}^{2} + 3) \\ = 2 {x}^{2} + 4x + 3 - 10 {x}^{2} - 6 \\ =( - 8 {x}^{2} + 4x - 3)$