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(a) Find f(1/2).
(b) Solve f(x) = 0.

(a) Find f(1/2). (b) Solve f(x) = 0.-example-1

1 Answer

1 vote

Answer:

a) f(1/2)= - 4, b) f(x)=0 when x=-0.5, x=0.633,x= - 1.383

Explanation:

f(x):(2x+1)=8x²+6x-7

f(x)=(2x+1)*(8x²+6x-7)

a) f(1/2)= (2*(1/2)+1)*(8*(1/2)²+6*(1/2)-7)=(1+1)(2+3-7)=2*-2= - 4

f(1/2)= - 4

b) f(x)=0

(2x+1)*(8x²+6x-7)=0

2x+1=0, x= - 1/2

8x²+6x-7=0

x=(-b+/-√(b^2-4ac))/2a

x=(-6+/-√(6²-4*8*(-7)))/2*8=(-6+/-√(260))/16

x=0.633 and x=-1.383

User Mikhail Sidorov
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