Find the value $3 x (4 x - 5) + 3$ when $x = 3$

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Solution

$3 x (4 x - 5) + 3$
for x=3
$12 x^{2} - 15 x + 3$
$\Rightarrow 12 x^{2} - 12 x - 3 x + 3$
$\Rightarrow 12 x (x - 1) \div 3 (x - 1)$
$\Rightarrow (12 x - 3) (x - 1)$
if x=3
$\Rightarrow (12 \times 3 - 3) (3 - 1)$
$\Rightarrow 33 \times 2$
= 66

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Similar questions

3 x (4 x - 5) + 3

x = 3

3 x (4 x - 5) + 3

x = 3

3 x (4 x - 5) + 3

x = 3

x = \frac{1}{2}

3 x (4 x - 5) + 3

x = \frac{1}{2}

3 x (4 x - 5) + 3

x = 3

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