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lapo4ka [179]
4 years ago
12

Sovle for x . 4(x-4)=36

Mathematics
1 answer:
Katena32 [7]4 years ago
7 0

Answer:

below

Step-by-step explanation:

x.4 ( x-4) = 36 \\

4x(x-4) = 36 \\

4x^{2} - 16x = 36

add -36 to both sides

4x^{2} - 16x - 36 = 36 -36 \\4x^{2} -16x - 36 = 0

divide both sides by 2

\frac{4x^{2} - 16x - 36  }{4} = 0/4

x^{2} -4x-9 = 0

This is a quadratic equation

let's solve it by  graphing it

The solution are the x-coordinates of the intersection points

The x-coordinates of the intersection points are approximatively -1.6 and 5.6

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