
By the quadratic formula,

Then


Multiply numerator and denominator by the denominator's conjugate:

Answer:
3
Step-by-step explanation:
4x + 3 = 7
Hey there!


When always adding or subtracting, you <em>always</em> have to <u>line up the decimal</u>.
When subtracting decimals with the same sign you <u>Line up the decimal</u>.
Hope this helps!