1.

Multiply:(5x2 + 7x – 3) by 4x2

Answer»

(5x2 + 7x – 3) × 4x2

= 4x2(5x2 + 7x – 3) Multiplication is commutative

= 4x2 (5x2 + 4x2 (7x) + 4x2 (-3)

= (4 × 5)(x2 × x2) + (4 × 7)(x2 × x) + (4 × -3)(x2)

= 20x4 + 28x3 – 12x2



Discussion

No Comment Found