Question

If A = 3x^2 - 7x – 8 and B = x^2 – 5x – 4, find
2A + B.​

Answer 1

Answer:

$7 {x}^{2} - 19x - 20$

Step-by-step explanation:

$2a + b =( 6 {x}^{2} - 14x - 16) + {x}^{2} - 5x - 4 \\ \: \: \: \: = 7 {x}^{2} - 19x - 20$

Answer 2

Given that A = 3x² - 7x - 8

And. B = x² - 5x - 4

2A + B = 2 [ 3x² - 7x - 8 ] + [ x² - 5x - 4 ]

= 6x² - 14x - 16 + x² - 5x - 4

= 6x² + x² - 14x - 5x - 16 - 4

= 7x² - 19x - 20 Ans..

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