We will use the substitution:
t = x² ;
t² + 21 x - 100 = 0
t² + 25 t - 4 t - 100 = 0
t ( t + 25 ) - 4 ( t + 25 ) = 0
( t + 25 ) ( t - 4 ) = 0
t 1 = - 25, t 2 = 4
x = √t
Answer:
The roots are:
x 1 = 5 i
x 2 = - 5 i
x 3 = - 2
x 4 = 2
Alright....area is equal to times width. That would mean x*5=7. Because of the Division Property of Equality we can actually divide 5 on both sides to get x=7/5.
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Answer:
100
Step-by-step explanation:
The original area is (200 m)×(300 m) = 60000 m². You want an area that is ...
(200 +x)×(300 +x) = 120000
60000 +500x +x² = 120000 . . . . eliminate parentheses
x² +500x -60000 = 0 . . . . . . . . . . subtract 120000
(x +600)(x -100) = 0 . . . . . . . . . . . . factor
The positive value of x that makes a factor zero is x = 100.
The value of x is 100.
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<em>Check</em>
The larger plot will be 300×400, the larger dimension being double the original smaller dimension.
Step-by-step explanation:
10 Three pointers and 2 two pointers
Rip Kobe may he rest in peace
