Advertisements
Advertisements
Question
Expand the following:
(m + 8) (m - 7)
Sum
Advertisements
Solution
(m + 8) (m - 7)
= m2 + 8m - 7m - 56
= m2 + m - 56
(Using identify : (x+ a) (x - b)
= x2 + (a - b) x - ab).
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Evaluate the following using identities:
`(2x+ 1/x)^2`
If \[x^2 + \frac{1}{x^2} = 98\] ,find the value of \[x^3 + \frac{1}{x^3}\]
Evaluate of the following:
(103)3
Find the following product:
\[\left( \frac{3}{x} - 2 x^2 \right) \left( \frac{9}{x^2} + 4 x^4 - 6x \right)\]
Use identities to evaluate : (998)2
If a - b = 4 and a + b = 6; find
(i) a2 + b2
(ii) ab
If a + `1/a`= 6 and a ≠ 0 find :
(i) `a - 1/a (ii) a^2 - 1/a^2`
Evaluate: (9 − y) (7 + y)
If p + q = 8 and p - q = 4, find:
pq
If x + y + z = p and xy + yz + zx = q; find x2 + y2 + z2.
