Question

Write the quadratic equation in standard form. What is the value of b 2 - 4ac? 1 = 2x 2 + 7x 40 41 57

Answer 1

Answer:

$2x^2+7x-1=0$

the value of $b^2-4ac$ is 57

Step-by-step explanation:

$1 = 2x^2 + 7x$

Standard form of a quadratic equation is $ax^2+bx+c=0$

Subtract 1 on both sides to get the standard form of the equation.

$2x^2+7x-1=0$

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

From the standard form, the value of a=2, b=7, c=-1

the value of $b^2-4ac=(7)^2-4(2)(-1)=49+8=57$

the value of $b^2-4ac$ is 57

Answer 2

Hello : 
2x² +7x +1
a=2        b = 7      c =1
b²-4ac = (7)²-4(2)(1) =49 -8 =41