How can I do this math question? Really urgent!!!?

This is just brute-force calculations. No tricks or general forms to fall back on...

(2x - 1/2)^4

(2x - 1/2)² (2x - 1/2)²

Here, we can use this general form:

(x - y)² = x² - 2xy + y²

So we get:

(4x² - x + 1/4) (4x² - x + 1/4)

Now we have two trinomials, FOIL them like normal to get:

16x^4 - 4x³ + x² - 4x³ + x² - x/4 + x² - x / 4 + 1/16

Combine like terms...

16x^4 - 8x³ + 3x² - x/2 + 1/16

To expand (A + B)n by the binomial theorem

Start out with the 1st term, which is 1AnB0

then:

1. Multiply the numerical coefficient by the exponent of A,

2. Divide that by the number of term

3. Write that number down to start the next term

4. Beside that write A with an exponent that is 1 less

5. Beside that write B with an exponent that is 1 more.

This will be the next term. Then repeat the process with

the new term. You are finished when the

exponent of A becomes 0 and the exponent of B becomes n

Ew. I just got done learning that ish. I don't want to do it.

to find the x?