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Factorisation Using Algebraic Identities

2-50x2=? a 21...

Question

$(2 - 50 x^{2}) = ? (a) 2 (1 - 5 x)^{2} (b) 2 (1 + 5 x)^{2} (c) (2 - 5 x) (2 + 5 x) (d) 2 (1 - 5 x) (1 + 5 x)$

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Solution

$2 - 50 x^{2} = 2 (1 - 25 x^{2}) = 2 {(1)^{2} - (5 x)^{2}} = 2 (1 - 5 x) (1 + 5 x)$

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Q. Tick (✓) the correct answer:
(2 − 50x²) = ?
(a) 2(1 − 5x)²
(b) 2(1 + 5x)²
(c) (2 − 5x)(2 + 5x)
(d) 2(1 − 5x)(1 + 5x)

4 x^{3} + 8 x^{2}

- 2 x^{3} + 3 x^{2}

Q. Linked Comprehensive type

A = 5 x^{2} - 16 x - 21

B = 3 (x + 2)^{2} - 5 (x + 2) + 2

A

Q. Linked Comprehensive type

A = 5 x^{2} - 16 x - 21

B = 3 (x + 2)^{2} - 5 (x + 2) + 2

Sum of the factors of

A

B

Q. Factorize:
5x² − 16x − 21

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Factorisation Using Algebraic Identities

Standard VIII Mathematics

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