Question

multiply 2x^2-5x+4 by x^2+7x-8 add the difference of 8x^2-5x+3 and 6x^2+2x-9
correct answer will be marked brainlist :)​

Answer 1

Answer:

4X^4+9x^3-33X^2+65x-38

Step-by-step explanation:

step-1:

Multiply 1St & 2nd equ

(2X^2 -5X+4) × (X^2 +7x-8)

= 4X^4+9X^3-47X^2+68x-32

step-2:

Subtraction of remaining two equ from 3 to 4

(8X^2-5X+3) - (6X^2+2x-9)

= 14X^2-3x-6

step-3:

add these equ

(4X^4+9X^3-47X^2+68x-32) + (14X^2-3x-6)

= 4X^4+9x^3-33X^2+65x-38