The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

a + b = 1

Step-by-step explanation:

We have the roots of ax²+bx+c = 0 as .

Sum of roots

Here equation is x²-x-90 = 0

a = 1, b = -1 and c = -90

Sum of roots = a + b

a + b = 1

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

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