kekekayla13 kekekayla13

25-01-2019
Mathematics

contestada

x^2+14=9x

A) x = 2, x = 7
B) x = 3, x = 5
C) x = −2, x = −7
D) x = −3, x = −5

Respuesta :

Mathalpha Mathalpha

25-01-2019

X squared +14=9x
Square both sides and you get
X+14=3x subtract 14 from both sides
Z
X=3x-14 subtract 3x

-2x=-14 divide negative 2
X=7

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