ANSWER
EXPLANATION
We want to solve the equation:
To do this, find the square root of both sides of the equation:
This will yield two results:
Solving the two equations, we have:
The solutions are:
To solve this question, simply add the terms that are the same together, in this case you would add 2x together and 4x’s.
Keep the constant 4 separate.
10x - 4, should be the answer.
None of the answers are correct ?
x = 3 → (3, 0)
to find the x- intercept let y = 0 in the equation
7x - 21 = 0
add 21 to both sides
7x = 21
divide both sides by 7
x = = 3 → x- intercept