Question

2. Consider the functions

f(x) = 8x – 10 and g(x) = 2x – 7.
What is the zero of function g?
A 3.5
B -7
C 2
D -3.5

Answer 1

1 Subtract 8x8x from both sides.

fx-8x=-10fx−8x=−10

2 Factor out the common term xx.

x(f-8)=-10x(f−8)=−10

3 Divide both sides by f-8f−8.

x=-\frac{10}{f-8}x=−

​f−8

​

​10

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1 Subtract 2x2x from both sides.

gx-2x=-7gx−2x=−7

2 Factor out the common term xx.

x(g-2)=-7x(g−2)=−7

3 Divide both sides by g-2g−2.

x=-\frac{7}{g-2}x=−

​g−2

​

​7

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