Question

Add the following.

5x2 – 7x + 3 , -8x2 + 2x -5 and 7x2 – x – 2

Answer 1

$= ({5x}^{2} - 7x + 3) + ( { - 8x}^{2} + 2x - 5) + \\ ( {7x}^{2} - x - 2)$

$= {5x}^{2} - 7x + 3 { - 8x}^{2} + 2x - 5 + \\ {7x}^{2} - x - 2$

$= {5x}^{2} - {8x}^{2} + {7x}^{2} \\ - 7x + 2x - x + 3 - 5 - 2$

$= {4x}^{2} - 6x - 4$

hope it will help you