Question

What is the value of b2 - 4ac for the following equation? 5x2 + 7x = 6

Answer 1

Answer:

$\text{The value of }(b^2-4ac)\thinspace is\thinspace 169$

Step-by-step explanation:

Given the equation $5x^2 + 7x = 6$

we have to find the value of $b^2-4ac$

Equation: $5x^2+7x-6=0$

Comparing above with general quadratic equation $ax^2+bx+c=0$

we get, a=5, b=7 and c=-6

$b^2-4ac=(7)^2-4(5)(-6)=49+120=169$

Hence,

$\text{The value of }(b^2-4ac)\thinspace is\thinspace 169$

Answer 2

B²-4ac? 

5x²+7x-6 = 0 
the form is ax²+bx+c = 0 

a=5, b=7, c=-6 


The discriminant D = b²-4ac 
= 7² - 4(5)(-6) = 49 + 120 
= 169