Evaluate, Using (A + B)(A - B)= A2 - B2. 4.9 X 5.1

Evaluate, using (a + b)(a - b)= a² - b².
4.9 x 5.1

योग

4.9 x 5.1
= (5 - 0.1) x (5 + 0.1)
= (5)² - (0.1)²
= 25 - 0.01
= 24.99.

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अध्याय 3: Expansions - Exercise 4.1

अध्याय 3 Expansions
Exercise 4.1 | Q 6.3

Simplify (a + b + c)² + (a - b + c)²

Find the cube of the following binomials expression :

\[4 - \frac{1}{3x}\]

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\[\left( \frac{3}{x} - \frac{x}{3} \right) \left( \frac{x^2}{9} + \frac{9}{x^2} + 1 \right)\]

If a + b + c = 9 and ab + bc + ca = 23, then a² + b² + c² =

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(3x + 4) (2x - 1)

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m + n

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`(x - 1/x)(x^2 + 1 + 1/x^2)`