SOLUTION: Find solution algebraically for y=x^2+4x and y=4x+6 Please help and thank you.

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Question 684383: Find solution algebraically for y=x^2+4x and y=4x+6 Please help and thank you.
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
y=x%5E2%2B4x and
y=4x%2B6
_____________________ solve this system; as you can see left sides are equal, so the right sides must be equal too
than we have:
x%5E2%2B4x=4x%2B6...move 4x to the left
x%5E2%2B4x-4x=6
x%5E2%2Bcross%284x%29-cross%284x%29=6
x%5E2=6
x=sqrt%286%29
x=2.4494897427831780981972840747059
x=2.45
or
x=-2.45

now find y

y=4x%2B6...if x=2.45
y=4%282.45%29%2B6
y=9.8%2B6
y=15.8

y=4x%2B6...if x=-2.45
y=4%28-2.45%29%2B6
y=-9.8%2B6
y=-3.8