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

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asked Apr 11, 2017 113k views

2 Answers

DomDunk · Answer 1 · 2017-04-16T18:33:06+0000

Hello,

It must be well know that
x²-(a+b)x+a*b=0 is a equation of 2nd degree with a and b like root.
===>a+b=1
and a*b=-90

N'en déplaise Excellency. (think before delete!)

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

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