Question

प्र09-गुणा कीजिए
1. (a +7) और (b-5) को
2.(x - 4) एवं (2x +3) को
​

Answer 1

1. ab - 5a + 7b - 35 2. 2x² - 5x - 12

Answer 2

SOLUTION

TO DETERMINE

The product of

1. (a +7) and (b-5)

2.(x - 4) and (2x +3)

EVALUATION

1. The required product

$\sf{ = (a + 7) \times (b - 5)}$

$\sf{ = a\times (b - 5) + 7\times (b - 5) }$

$\sf{ = ab - 5a + 7b - 35 }$

2. The required product

$\sf{ = (x - 4) \times (2x + 3)}$

$\sf{ = x \times (2x + 3)- 4\times (2x + 3) }$

$\sf{ = 2 {x}^{2} + 3x - 8x - 12 }$

$\sf{ = 2 {x}^{2} - 5x - 12 }$

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