Answered

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What are the coordinates of y=-5x2 30x-25

Sagot :

Answer:

coordinates (x, y) = (3, 20)

Step-by-step explanation:

y = -5x² + 30x - 25

quadratic equation is:

y = ax² + bx + c

where:

x = -b / 2a

from the given quadratic equation:

a = -5, b = 30, c = -25

i.e.

x = -30 / 2(-5) = -30/-10 = 3

by substituting the value of x in equation:

y = -5(3)² + 30(3) - 25

  = -45 + 90 - 25 = -70 + 90

y = 20

thus,

coordinates (x, y) = (3, 20)

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