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Ratio and Proportion

What is the v...

Question

What is the value of $3 (x^{2} - 4 x)$ when $x = 5$ ?

5

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15

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30

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55

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Solution

The correct option is B $15$
$3 (x^{2} - 4 x)$
If x=5
$3 (5^{2} - 45)$
$3 (5^{2} - 4 * 5) = 3 (25 - 20) = 15$
Answer (B) 15

Suggest Corrections

Similar questions

3 x^{2} + 4 x - 5

(x - 1)

x

15 + 4 x - 3 x^{2}

p (x) = 4 x - 5

x - 3

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

a

x^{3} - 3 x^{2} + 4 x - 5

\sqrt{\frac{(x - 3) (x^{2} + 4)}{3 x^{2} + 4 x + 5}}

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