Question

Rewrite the equation 4x + 5x2 = 8x – 7 in standard form and

identify a, b, and c.
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Select one:
a. a = 5,6 = 4,c= 7
b. a = 5,6 = -4,c = 7
c. a = - 4,6 = 5,c = 7
d. a = 5,6 = 8,c = -7

Answer 1

The correct option is a=5, b = -4, c=7 ....

Explanation:

The standard form is ax²+bx+c=0

where a, b, and c being constants, or numerical coefficients, and x is an unknown variable.

The given expression is:

4x + 5x2 = 8x – 7

To make it a standard equation we will move all the values to the left hand side and 0 will be left at the right hand side.

4x+5x²-8x+7=0

Now solve the like terms and arrange the equation according to the standard form:

ax²+bx+c=0

5x² - 4x +7 =0

Here a = 5

b = -4

c= 7

Thus the correct option is a=5, b = -4, c=7 ....