   Chapter 1.1, Problem 140E
Textbook Problem

solve the equation by using the quadratic formula.140. 2x2 + 7x − 15 = 0

To determine
The roots of the quadratic equation by using quadratic method.

Explanation

Given: The quadratic equation is 2x2+7x15=0 .

Calculation:

The roots of the quadratic equation is,

x=b±b24ac2a (1)

The given equation is in the standard form with a=2,b=+7,c=15 .

Substitute the value of a,b,c in equation (1),

x=7±(7)24×2×

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