Question
Asked Nov 19, 2019
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Solve the following system of equations by the substitution method. 

y=x2

y=x+20

what is the solution set

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Expert Answer

Step 1

Given information

У-х......)
(1)
у-х+20.........2)
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У-х......) (1) у-х+20.........2)

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Step 2

To determine solution sets by substitution method

Step 3

Calculation

Put value of y from equa...

xx20
x2-x20 0
x2-5x4x-20 0
(x-5)+4(x-5)0
(x-5)(x+4) 0
x =-45
so
y(-4).(5)
y 16, 25
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xx20 x2-x20 0 x2-5x4x-20 0 (x-5)+4(x-5)0 (x-5)(x+4) 0 x =-45 so y(-4).(5) y 16, 25

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Algebra

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