# Solve the Following Quadratic Equation Using Formula Method Only - Mathematics

Sum

Solve the following quadratic equation using formula method only :

x2 +10x- 8= 0

#### Solution

x2 +10x- 8= 0

a = 1 ; b = 10 , c = - 8

D = b2 - 4ac

= (10)2 - 4(1)(-8)

= 100 + 32

= 132

x = (- "b" ± sqrt ("b"^2 - 4 "ac"))/(2a)

x = (- 10 ± sqrt 132)/2

x = -10/2 ±  sqrt (132/4)

x = - 5 + sqrt 33 ,   x = -5 - sqrt 33

Is there an error in this question or solution?

#### APPEARS IN

Frank ICSE Class 10 Mathematics Part 2
Exercise 6.2 | Q 3.02