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

2 answers:

8 0

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

REY [17]3 years ago

3 0

Answer:

Step-by-step 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 = $\frac{-B}{A}$

a+b= $-\frac{-1}{1} =1$

hence a+b will be 1 : Answer

Hope it will help :)

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Step-by-step explanation:

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3 years ago

Read 2 more answers

if an exterior angle of a regular polygon measures 15 degrees how many sides does it have ?a.23. b.24. c.25

dimaraw [331]

Answer:

B.24

Step-by-step explanation:

we know,

exterior angle = 360°/n(where 'n' is number of sides)

then,

15° = 360°/n