Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate the following products :
(y + 5)(y – 3)
बेरीज
Advertisements
उत्तर
(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
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Expand the following, using suitable identity:
`[1/4a-1/2b+1]^2`
Write in the expanded form: (ab + bc + ca)2
If a − b = 4 and ab = 21, find the value of a3 −b3
Find the following product:
(1 + x) (1 − x + x2)
If \[x - \frac{1}{x} = \frac{15}{4}\], then \[x + \frac{1}{x}\] =
Use identities to evaluate : (97)2
Evaluate: (9 − y) (7 + y)
Find the squares of the following:
3p - 4q2
If p + q = 8 and p - q = 4, find:
p2 + q2
If x + y = 1 and xy = -12; find:
x2 - y2.
