The

expression

2x2

–

10x

28

can

be

used

to

model

the

height

of

a

ball

thrown

in

air

after

x

seconds.

Use

quadratic

formula

provided

below

figure

out

how

long

will

it

take

for

hit

ground.

=

2,

b

‐10,

and

c

‐28.

Provide

positive

solution

only.

Thank you for the opportunity to help you with your question!

2x^2-10x-28

2x^2-14x+4x-28

2x(x-7)+4(x-7)

(2x+4)(x-7)

x=-2 0r 7

=7

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