Question

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

Answer 1

x^2 - x - 90 =0
This equation is in standard form ax^2+ bx + c
The sum of the solutions is -b/a (a and b are the coefficients from the equation above, not the solutions to the equation)
The answer is 1/1 = 1

Answer 2

Explanation:

Alright, let get started.

The given equation is :
`x^2-1x-90=0`

This is a quadratic equation.

The standard form of a quadratic equation is :
`AX^2+BX+C=0`

Comparing the given equation with standard one, the values of A ,B and C are :

A is 1

B is -1

C is -90

Since a and b are the roots of the equation, so the formula for sum of roots a+b will be =
`(-B)/(A)`

a+b=
`-(-1)/(1) =1`

hence a+b will be 1 : Answer

Hope it will help :)