Advertisements
Advertisements
Question
Use the direct method to evaluate the following products :
(y + 5)(y – 3)
Sum
Advertisements
Solution
(y + 5) (y – 3) = (y × y) + (y × −3) + (5 × y) + (5 × −3)
= y2 + (−3y) + (5y) − 15
= y2 − 3y + 5y − 15
= y2 + 2y − 15
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Evaluate the following product without multiplying directly:
95 × 96
Evaluate the following using identities:
(2x + y) (2x − y)
Find the cube of the following binomials expression :
\[\frac{1}{x} + \frac{y}{3}\]
Find the square of 2a + b.
Find the square of : 3a - 4b
If `"a"^2 - 7"a" + 1` = 0 and a = ≠ 0, find :
`"a" + (1)/"a"`
If `x + (1)/x = "p", x - (1)/x = "q"`; find the relation between p and q.
Simplify:
(3x + 5y + 2z)(3x - 5y + 2z)
Using suitable identity, evaluate the following:
9992
Expand the following:
(–x + 2y – 3z)2
