Question

If the
Square
of twice a number is
9 more than trice the square of the
given numbee, than the number can
(a) 6 or -6
(b) 3 or -3
(c)5 or -5

answer me fast
with step by step.....​

Answer 1

Answer:

Let x be the number

Then by the given condition

(2x) ² = 3x² + 9

4x² = 3x² + 9

x² = 9

x = 3 or - 3

So the required answer is (b) 3 or -3

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Answer 2

x = 3....

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