Expand each of the following expressions using algebraic identities:
a) (7x+9)²
b) (1-3x)²
c) (5x+8) (5x-8)
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Expand each of the following expressions using algebraic identities:
a) (7x+9)²
b) (1-3x)²
c) (5x+8) (5x-8)
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Answer:
Step-by-step explanation:
Step-by-step explanation:
a) (7x + 9)^2
7x^2 + 2 × 7x × 9 + 9^2
49x^2 + 126x + 81
b) ( 1 - 3x)^2
1^2 - 2 × 1 × 3x + 3x^2
1 - 6x + 9x^2
c) (5x + 8)(5x - 8)
{(5x)^2 - (8)^2}
25x - 64
Hope it helps!!