Answer:
Concept:
quadratic formula
x= -b ± √b² - 4ac/2a
Find:
We solve the equation by quadratic formula
Given:
x² - 28x + 160 = 0
Step by step explation:
Use the quadratic formula
Once in standard form, identify a, b and c from the original equation and plug them into the quadratic formula.
a = 1
b = -28
c = 160
x =-(-28) ± √(-28)² - 4*1*160/2*1
x=28± √784-640/2
x=28± 12/2
x=28+12/2
x=40/2
x=20
x=28-12/2
x=16/2
x=8
Hence the value of x is 20 and 8
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Verified answer
Answer:
Concept:
quadratic formula
x= -b ± √b² - 4ac/2a
Find:
We solve the equation by quadratic formula
Given:
x² - 28x + 160 = 0
Step by step explation:
x² - 28x + 160 = 0
Use the quadratic formula
x= -b ± √b² - 4ac/2a
Once in standard form, identify a, b and c from the original equation and plug them into the quadratic formula.
x² - 28x + 160 = 0
a = 1
b = -28
c = 160
x =-(-28) ± √(-28)² - 4*1*160/2*1
x=28± √784-640/2
x=28± 12/2
x=28+12/2
x=40/2
x=20
x=28-12/2
x=16/2
x=8
Hence the value of x is 20 and 8