Advertisements
Advertisements
Question
Use the direct method to evaluate the following products :
(8 – b) (3 + b)
Advertisements
Solution
(8 – b) (3 + b) = (8 × 3) + (8 × b) + (−b × 3) + (−b × b)
= 24 + 8b − 3b − b2
= 24 + 5b − b2
APPEARS IN
RELATED QUESTIONS
Simplify the following: 175 x 175 x 2 x 175 x 25 x 25 x 25
If 2x + 3y = 8 and xy = 2 find the value of `4x^2 + 9y^2`
Evaluate of the following:
(9.9)3
If x = −2 and y = 1, by using an identity find the value of the following
If a + b + c = 0, then write the value of \[\frac{a^2}{bc} + \frac{b^2}{ca} + \frac{c^2}{ab}\]
If x + y = `7/2 "and xy" =5/2`; find: x - y and x2 - y2
If a - b = 0.9 and ab = 0.36; find:
(i) a + b
(ii) a2 - b2.
If p + q = 8 and p - q = 4, find:
p2 + q2
Simplify:
(1 + x)(1 - x)(1 - x + x2)(1 + x + x2)
Give possible expressions for the length and breadth of the rectangle whose area is given by 4a2 + 4a – 3.
