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Expression Formation

Question 4 ii...

Question

Question 4 (iii)

If a = 2, b = -2, find the value of:
$a^{2} - b^{2}$

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Solution

$a^{2} - b^{2} = (2)^{2} - (- 2)^{2}$ [Putting a = 2, b = -2]
= 4 – 4 =0

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Similar questions

Question 4 (i)

If a = 2, b = -2, find the value of:
$a^{2} + b^{2}$

Question 4 (ii)

If a = 2, b = -2,find the value of:
$a^{2} + a b + b^{2}$

If a = 2, b = − 2, find the value of:

(i) a²+ b² (ii) a² + ab + b² (iii) a² − b²

\frac{15 a^{2} + 4 b^{2}}{15 a^{2} - 4 b^{2}} = \frac{47}{7}

\frac{a}{b}

\frac{7 a - 3 b}{7 a + 3 b}

\frac{b^{2} - 2 a^{2}}{b^{2} + 2 a^{2}}

\frac{b^{3} - 2 a^{3}}{b^{3} + 2 a^{3}}

a = 2, b = - 2

a^{2} + b^{2}

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