3 years ago

Help with the question below please!!

Mathematics

2 answers:

Nady [450]3 years ago

8 0

Step-by-step explanation:

a) f(5)= 5² + 4 x 5 -21

=24

b) f(0)= 0² + 4 x 0 -21

= -21

c) f(x)= 0

=> x² + 4x -21 =0

=> x = 3, x= -7

Ratling [72]3 years ago

7 0

Answer:

a.= 24 b.=-21 c. is x=-7 or 3

Step-by-step explanation:

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