Advertisements
Advertisements
प्रश्न
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 14x + 49
बेरीज
Advertisements
उत्तर
We have,
x2 + 14x + 49
= x2 + 2 × 7 × x + 72
= (x + 7)2
= (x + 7)(x + 7)
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 7: Algebraic Expression, Identities and Factorisation - Exercise [पृष्ठ २३४]
APPEARS IN
संबंधित प्रश्न
Simplify (4m + 5n)2 + (5m + 4n)2
Using identities, evaluate 297 × 303
Using identities, evaluate 1.05 × 9.5
Of which of the binomials given below is m2n2 + 14mnpq + 49p2q2 the expansion?
Expand:
`("p"/3 + "q"/4)^2`
Factors of 9x2 + 6xy are
Expand the following square, using suitable identities
(mn + 3p)2
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
`9x^2 + 2xy + y^2/9`
Verify the following:
(a + b)(a + b)(a + b) = a3 + 3a2b + 3ab2 + b3
Verify the following:
(7p – 13q)2 + 364pq = (7p + 13q)2
