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प्रश्न
Find the following product: (x + 7) (x − 5)
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उत्तर
Here, we will use the identity \[\left( x + a \right)\left( x - b \right) = x^2 + \left( a - b \right)x - ab\].
\[\left( x + 7 \right)\left( x - 5 \right)\]
\[ = x^2 + \left( 7 - 5 \right)x - 7 \times 5\]
\[ = x^2 + 2x - 35\]
संबंधित प्रश्न
Find the following product: \[\left( z + \frac{3}{4} \right)\left( z + \frac{4}{3} \right)\]
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(x2y – xy2)2
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| Column I | Column II |
| (1) (21x + 13y)2 | (a) 441x2 – 169y2 |
| (2) (21x – 13y)2 | (b) 441x2 + 169y2 + 546xy |
| (3) (21x – 13y)(21x + 13y) | (c) 441x2 + 169y2 – 546xy |
| (d) 441x2 – 169y2 + 546xy |
