Look at the pic. thanks

{-7/2, 7/2}

Step-by-step explanation: To solve this polynomial equation,

we first need to set it equal to 0 by subtracting 68 from both sides.

That leaves us with 4a² - 49 = 0.

Notice that the left side represents the difference of 2 squares.

Since 4 factors as 2 · 2 and a² factors as a · a, 4a² factors as 2a · 2a

so we use those factors as the first term in each binomial.

Since 49 is also a perfect square, 7 · 7,

we use a 7 as the second term in each binomial.

So we have (2a + 7)(2a - 7) = 0.

This means that either 2a + 7 = 0 or 2a - 7 = 0.

Solving each equation from here, our solution set is {-7/2, 7/2}.

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get