write the following algebraically using x as your unknown "i think of a number, multiply it by 3, add 4 and square the result"

(3x + 4) ²

Step-by-step explanation:

I think of a number x, then i multiply it by 3, add 4 and square the result.

Representing this mathematically,

x * 3 = 3x

Then add 4 which will be 3x + 4

Squaring the result would be (3x + 4) ².

So, if we give our unknown which is x the value of say, 3.

Substituting the value of x into that equation would be easy.

(3 (3) + 4) ²

= (9 + 4) ²

= (11) ²

=132.