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Factorisation Using Algebraic Identities

If y=5 and z=...

Question

If $y = 5 a n d z = 2$ , evaluate:

iii) $5 y^{2}$

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Solution

Step: Evaluate

Given: $5 y^{2}$

Substituting $y = 5$ in the given expression

$5 y^{2} = 5 \times (5)^{2}$

$= 5 \times 25$

$= 125$

Hence, the value of $5 y^{2}$ for $y = 5 a n d z = 2 i s 125.$

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