Question
Simplify the expression
x4+9x2+a2−6x3−2x2a+6xa
Evaluate
(x2−3x−a)2
Use (a+b+c)2=a2+b2+c2+2ab+2ac+2bc to expand the expression
(x2)2+(−3x)2+(−a)2+2x2(−3x)+2x2(−a)+2(−3x)(−a)
Calculate
More Steps

Evaluate
(x2)2
Multiply the exponents
x2×2
Multiply the terms
x4
x4+(−3x)2+(−a)2+2x2(−3x)+2x2(−a)+2(−3x)(−a)
Calculate
More Steps

Evaluate
(−3x)2
Determine the sign
(3x)2
To raise a product to a power,raise each factor to that power
32x2
Evaluate the power
9x2
x4+9x2+(−a)2+2x2(−3x)+2x2(−a)+2(−3x)(−a)
Calculate
x4+9x2+a2+2x2(−3x)+2x2(−a)+2(−3x)(−a)
Calculate
More Steps

Evaluate
2x2(−3x)
Multiply the numbers
More Steps

Evaluate
2(−3)
Multiplying or dividing an odd number of negative terms equals a negative
−2×3
Multiply the numbers
−6
−6x2×x
Multiply the terms
More Steps

Evaluate
x2×x
Use the product rule an×am=an+m to simplify the expression
x2+1
Add the numbers
x3
−6x3
x4+9x2+a2−6x3+2x2(−a)+2(−3x)(−a)
Multiply the numbers
x4+9x2+a2−6x3−2x2a+2(−3x)(−a)
Solution
More Steps

Evaluate
2(−3x)(−a)
Multiply the numbers
More Steps

Evaluate
2(−3)
Multiplying or dividing an odd number of negative terms equals a negative
−2×3
Multiply the numbers
−6
−6x(−a)
Multiply the numbers
6xa
x4+9x2+a2−6x3−2x2a+6xa
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