New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 8 Algebraic Expressions Self Practice 5D Solution
Find the product. (You may use any method – horizontal or vertical)
(1) (a) (y – 6) (2y + 7)
(b) (3x -7) (5x – 8)
(c) (x – 2) (6x + 9)
(d) (3m2 – n) (m2 – 2n)
(e) (3a – b2) (2a + 7b2)
(f) (x2 – 2xy) (3xy + y2)
SOLUTION Number 1:
(2) (a) (x – 2) (x2 – 3x + 2)
(b) (3x + 4) (x2 – 5x – 2)
(c) (3 – y) (5y2 – 2 – 3y)
(d) (4a – 3) (3a2 + 2 – 5a)
(e) (5x – 1) (-2x3 + 4x – 3)
(f) (2p2 – 3) (4p3 – p2 + 7)
SOLUTION Number 2:
(3) (a) (x + 1) (x2 – x + 1)
(b) (x – y) (x2 + xy + y2)
(4) (a) (x3 – 5x2 + 2) (x2 – 2x)
(b) (2x2 – 3x + 4) (x2 – 5x – 3)
(5) Simplify:
(x + 2) (x2 – 6x + 8) – (2x – 3) (2x2 – x – 1)
SOLUTION Number 3, 4, & 5:
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