Advertisements
Advertisements
Question
Find the following product: (x − 11) (x + 4)
Advertisements
Solution
Here, we will use the identity \[\left( x - a \right)\left( x + b \right) = x^2 + \left( b - a \right)x - ab\].
\[\left( x - 11 \right)\left( x + 4 \right)\]
\[ = x^2 + \left( 4 - 11 \right)x - 11 \times 4\]
\[ = x^2 - 7x - 44\]
RELATED QUESTIONS
Simplify the following using the formula: (a − b)(a + b) = a2 − b2: 95 × 105
If 2x + 3y = 14 and 2x − 3y = 2, find the value of xy.
[Hint: Use (2x + 3y)2 − (2x − 3y)2 = 24xy]
Using algebraic identity, find the coefficients of x2, x and constant term without actual expansion
(2x + 3)(2x – 5)(2x – 6)
Simplify: (2a + 3b + 4c) (4a2 + 9b2 + 16c2 – 6ab – 12bc – 8ca)
2p is the factor of 8pq
Simplify:
(1.5p + 1.2q)2 – (1.5p – 1.2q)2
Simplify:
(4.5a + 1.5b)2 + (4.5b + 1.5a)2
Expand the following, using suitable identities.
(2x + 9)(2x – 7)
Using suitable identities, evaluate the following.
(49)2
Using suitable identities, evaluate the following.
52 × 53
