Multiply 3a(a^2+5a-7)

Math
3a(a2+5a-7)
Apply the distributive property.
3a⋅a2+3a(5a)+3a⋅-7
Simplify.
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Multiply a by a2 by adding the exponents.
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Move a2.
3(a2a)+3a(5a)+3a⋅-7
Multiply a2 by a.
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Raise a to the power of 1.
3(a2a1)+3a(5a)+3a⋅-7
Use the power rule aman=am+n to combine exponents.
3a2+1+3a(5a)+3a⋅-7
3a2+1+3a(5a)+3a⋅-7
Add 2 and 1.
3a3+3a(5a)+3a⋅-7
3a3+3a(5a)+3a⋅-7
Multiply a by a.
3a3+3⋅5a2+3a⋅-7
Multiply -7 by 3.
3a3+3⋅5a2-21a
3a3+3⋅5a2-21a
Multiply 3 by 5.
3a3+15a2-21a
Multiply 3a(a^2+5a-7)

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