Distributive property to become (2x+14)+3x=12
x^2 - 7x + 15
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(x+4)/ x^3 - 3x^2 - 13x + 78
- x^3 + 4x^2
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- 7x^2 - 13x
- - 7x^2 - 28x
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15x + 78
- 15x + 60
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18
remainder = 18
For the first part remember that an equilateral triangle is a triangle in which all three sides are equal & all three internal angles are each 60°. <span>So x-coordinate of R is in the middle of ST = (1/2)(2h-0) = h
And for the second </span><span> since this is an equilateral triangle the x coordinate of point R is equal to the coordinate of the midpoint of ST, which you figured out in the previous answer. Hope this works for you</span>
X=2
Hope that helps!
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