Evaluate: (3 - 2x) (3 + 2x) (9 + 4x^2)

(3 \- 2x) (3 \+ 2x) (9 \+ 4x 2 ) Using the formula [∵ (x \+ y)(x \- y) = x 2 \- y 2 ] = (3 2 \- (2x) 2 ) (9 \+ 4x 2 ) = (9 \- 4x 2 ) (9 \+ 4x 2 ) = 9 2 \- (4x 2 ) 2 = 81 \- 16x 4 Hence, (3 \- 2x) (3 \+ 2x) (9 \+ 4x 2 ) = 81 \- 16x 4

Mathematics

Evaluate:
(3 - 2x) (3 + 2x) (9 + 4x²)

Identities

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Answer

(3 - 2x) (3 + 2x) (9 + 4x²)

Using the formula

[∵ (x + y)(x - y) = x² - y²]

= (3² - (2x)²) (9 + 4x²)

= (9 - 4x²) (9 + 4x²)

= 9² - (4x²)²

= 81 - 16x⁴

Hence, (3 - 2x) (3 + 2x) (9 + 4x²) = 81 - 16x⁴

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Mathematics

Evaluate:
(3 - 2x) (3 + 2x) (9 + 4x²)

Identities

Answer

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Mathematics

Evaluate:(3 - 2x) (3 + 2x) (9 + 4x2)

Identities

Answer

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Evaluate:
(3 - 2x) (3 + 2x) (9 + 4x²)

Evaluate:
$\Big(\dfrac{a}{2} -\dfrac{b}{3}\Big)$ $\Big(\dfrac{a}{2} +\dfrac{b}{3}\Big)$

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(a + b) (a - b) (a² + b²)

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(3x - 4y) (3x + 4y) (9x² + 16y²)

Use the formula: (a + b) (a - b) = a² - b² to evaluate:
(i) 21 x 19
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