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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
Show that (a - b)(a + b) + (b - c) (b + c) + (c - a) (c + a) = 0
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Find the value of x, if 5x = (50)2 − (40)2.
Find the following product: \[\left( y^2 + \frac{5}{7} \right)\left( y^2 - \frac{14}{5} \right)\]
Evaluate the following: 103 × 96
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(3a + 1) (3a – 2) (3a + 4)
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(1.5p + 1.2q)2 – (1.5p – 1.2q)2
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Using suitable identities, evaluate the following.
(52)2
