Evaluate 5x2 – 2y3 when x = 2 and y = 4

-4

Step-by-step explanation:

(substitute in x=2 and y=4 soo...)

5 x 2 x 2 = 20

2 x 4 x 3 = 24

20 - 24 = -4

answer: standard form is ax^2 + bx + c = 0

step-by-step explanation:

standard form is ax^2 + bx + c = 0

(2x + 1)(x - 2) = 0

distribute to get into standard form

2x^2 - 4x + x - 2 = 0

2x^2 - 3x - 2 = 0

a = 2, b= -3, c = -2

a is your answer