What is the value of the discriminant for the quadratic equation –3 = –x2 2x? discriminant = b2 – 4ac –8 4 8 16

we know that

The formula to solve a quadratic equation of the form is equal to

the discriminant is equal to

in this problem we have

so

substitute the values

therefore

the answer is

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)