Question

what must be added to 9x^3-6x^2+6x-7 to make the sum -6x^3-3x^2-x+1

Plz give correct answer. I will mark you brainlist.​

Answer 1

Answer-4x³+5x²-7x.-6

Answer 2

let the no. that will be added be x

• $\sf 9x³-6x²+6x-7+x = -6x³-3x²-x+1$

• $\sf x = -6x³-3x²-x+1-(9x³-6x²+6x-7)$

• $\sf x = -6x³-3x²-x+1-9x³+6x²-6x+7$

• $\sf x = -15x³+3x²-7x+8$

Verification:-

• $\sf 9x³-6x²+6x-7+(-15x³+3x²-7x+8)$

• $\sf 9x³-6x²+6x-7-15x³+3x²-7x+8$

• $\sf -6x³-3x²-x+1$

hence, the required polynomial is -6x³-3x²-x+1