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3 years ago

Helpppp with this :>

Mathematics

2 answers:

Paul [167]3 years ago

7 0

Answer:

x=9

Step-by-step explanation:

Iteru [2.4K]3 years ago

6 0

Answer:

x=9

Step-by-step explanation:

Area of a rectangle = length * width

84 = (x-2) * ( x+3); distribute

84 = x²+3x-2x-6; combine like terms and subtract 84 from both sides

0 = x² +x -90

if x= 9 will have 9² +9 -90= 81 +9 -90 = 90-90 = 0 so x=9 works

if x= 10 will have 10² +10 -90 = 100-80= 20 ≠0 so x= 10 does NOT work

if x= -10 and x= -9 will not make sense because we can NOT have a negative measurement

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