Question

Evaluate the expression for the given value. 3x(x−2), when x=7 .

Answer 1

Answer:

$\huge\boxed{Answer\hookleftarrow}$

Given,

$x = 7$

Substitute the value of 'x' in the equation 3x (x - 2).

One way :-

$3x(x - 2) \\ = 3 \times 7(7 - 2) \\ = 21(5) \\ = 21 \times 5 \\ = 105$

Second way :-

$3x(x - 2) \\ = 3x {}^{2} - 6x \\ = 3 \times (7) {}^{2} - 6(7) \\ = (3 \times 49) - (6 \times 7) \\ = 147 - 42 \\ = 105$

✐ The answer is 105.

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