Question

What should be added to (8x 3 – 4x 2 + 2x + 7) so as to make the sum equal to 10x 3 – 2x 2 + 7x + 20

Answer 1

Ans:

$let \: y \: should \: be \: added \: to \: 8x {}^{3} - 4x {}^{2} + 2x + 7$

$therefore \: according \: to \: question \: - \\ \\ 8x {}^{3 } - 4x {}^{2} + 2x + 7 + y = 10x {}^{3} - 2x {}^{2} + 7x + 20$

$=> y= 10x {}^{3} - 2 x {}^{2} + 7x + 20 - 8x {}^{3} + 4x {}^{2} - 2x - 7$

$=> y = 2x {}^{3} + 2x {}^{2} + 5x + 13$

$therefore \: 2x {}^{3} + 2x {}^{2} + 5x + 13 \: should \: be \: added \: to \: 8x {}^{3} - 4x {}^{2} + 2x + 7 \: to \: get \: 10x {}^{3} - 2x {}^{2} + 7x + 20$

I hope it will help you please mark me as Brainliest.