Advertisements
Advertisements
Question
Factorise the following.
y2 + 7y + 12
Sum
Advertisements
Solution
We have,
y2 + 7y + 12
= y2 + (4 + 3)y + 12
= y2 + 4y + 3y + 12
= y(y + 4) + 3(y + 4)
= (y + 4)(y + 3)
shaalaa.com
Is there an error in this question or solution?
Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 235]
APPEARS IN
RELATED QUESTIONS
Simplify (4m + 5n)2 + (5m + 4n)2
Simplify (2.5p − 1.5q)2 − (1.5p − 2.5q)2
Using identities, evaluate 297 × 303
Using identities, evaluate 1.05 × 9.5
Expand `("a"/2+"b"/3)^2`
Of which of the binomials given below is m2n2 + 14mnpq + 49p2q2 the expansion?
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 2x + 1
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
9x2 + 30x + 25
Verify the following:
(a + b)(a + b)(a + b) = a3 + 3a2b + 3ab2 + b3
What should be added to 4c(– a + b + c) to obtain 3a(a + b + c) – 2b(a – b + c)?
