Question
Simplify the expression
y10−8y9+16y8
Evaluate
(y4)2(y−4)2
Multiply the exponents
y4×2(y−4)2
Multiply the numbers
y8(y−4)2
Expand the expression
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Evaluate
(y−4)2
Use (a−b)2=a2−2ab+b2 to expand the expression
y2−2y×4+42
Calculate
y2−8y+16
y8(y2−8y+16)
Apply the distributive property
y8×y2−y8×8y+y8×16
Multiply the terms
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Evaluate
y8×y2
Use the product rule an×am=an+m to simplify the expression
y8+2
Add the numbers
y10
y10−y8×8y+y8×16
Multiply the terms
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Evaluate
y8×8y
Use the commutative property to reorder the terms
8y8×y
Multiply the terms
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Evaluate
y8×y
Use the product rule an×am=an+m to simplify the expression
y8+1
Add the numbers
y9
8y9
y10−8y9+y8×16
Solution
y10−8y9+16y8
Show Solution

Find the roots
y1=0,y2=4
Evaluate
(y4)2(y−4)2
To find the roots of the expression,set the expression equal to 0
(y4)2(y−4)2=0
Evaluate the power
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Evaluate
(y4)2
Transform the expression
y4×2
Multiply the numbers
y8
y8(y−4)2=0
Separate the equation into 2 possible cases
y8=0(y−4)2=0
The only way a power can be 0 is when the base equals 0
y=0(y−4)2=0
Solve the equation
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Evaluate
(y−4)2=0
The only way a power can be 0 is when the base equals 0
y−4=0
Move the constant to the right-hand side and change its sign
y=0+4
Removing 0 doesn't change the value,so remove it from the expression
y=4
y=0y=4
Solution
y1=0,y2=4
Show Solution
