Solve the system of equations
14x+y=−4
y=3x2−11x−4

(0,-4) & (-1,10)

Step-by-step explanation:

solve for the first variable in one equation then substitute the result into the other equation.

Point form:

(0,-4) & (-1,10)

Equation form:

x=0 y=-4

x=-1 y=10

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

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step-by-step explanation: