Question

if A=5x²+7 x+8 and B=4x² -7x+3,find 2A - B​

Answer 1

Step-by-step explanation:

$a = 5 {x}^{2} + 7x + 8 \\b = 4 {x}^{2} - 7x + 3 \\ 2a - b =2( 5 {x}^{2} - 7x + 8) - (4 {x}^{2} - 7x + 3) \\ = 10 {x}^{2} - 14x \: + 16 - 4 {x}^{2} + 7x - 3 \\ = 6 {x}^{2} - 7x + 3$

Answer 2

Answer:

solution:-let,A=5x²+7x+8

                    B=4x²-7x+3

now,2A-B=2(5x²+7x+80)-(4x²-7x+3)

               =2(5x²+7x+80)-4x²+7x-3

               =2*5x²-4x²+7x+7x+80-3

               =2*(x²+14x+77)

               =2x²+28x+154 ans

Step-by-step explanation:

I hope it helps you

plz... mark brainliest