Question

(C) (e) 3+ 2x - 4x², 4x + 3x2 +7,47 –5x+3​

Answer 1

(4x2 – 4x – 7)(x + 3)

(4x2 – 4x – 7)(x) + (4x2 – 4x – 7)(3)

4x2(x) – 4x(x) – 7(x) + 4x2(3) – 4x(3) – 7(3)

4x3 – 4x2 – 7x + 12x2 – 12x – 21

4x3 – 4x2 + 12x2 – 7x – 12x – 21

4x3 + 8x2 – 19x – 21

Answer 2

∆nswer :-

(4x² – 4x – 7)(x + 3)

(4x² – 4x – 7)(x) + (4x² – 4x – 7)(3)

4x²(x) – 4x(x) – 7(x) + 4x²(3) – 4x(3) – 7(3)

4x³ – 4x² – 7x + 12x² – 12x – 21

4x³ – 4x² + 12x² – 7x – 12x – 21

$\implies$ 4x³ + 8x² – 19x – 21