Math, asked by akshayaaryaa123, 1 month ago

Multiply :
(1) 2x2 - 4x + 5 by x2 + 3x - 7
(ii) (ab - 1) (3 - 2ab)​

Answers

Answered by bibi77205
1

Step-by-step explanation:

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Answered by sanapganesh841
0

Step-by-step explanation:

(i) 2x2 – 4x + 5 by x2 + 3x – 7

(2x2 – 4x + 5) × (x2 + 3x – 7)

2x2 (x2 + 3x -7) – 4x(x2 + 3x – 7) + 5(x2 + 3x -7)

2x4 + 6x3 – 14x2 – 4x3 – 12x2 + 28x + 5x2– 15x - 35

2x4 + 6x3 – 4x3 – 14x2 – 12x2 + 5x2 + 28x + 15x – 35

2x4 + 2x3 – 21x2 + 43x – 35

(ii) (ab – 1)  (3 – 2ab)

ab(3 – 2ab) – 1(3 – 2ab)

3ab – 2a2b2 – 3 + 2ab

-2a2b2 + 5ab – 3

2a2b2 – 5ab + 3

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