SOLUTION: need guidance on adding exponents the problem is 40a^8 + 16a^7 + 25a^9 thank you

Question 246291: need guidance on adding exponents
the problem is
40a^8 + 16a^7 + 25a^9
thank you
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
your equation is:

40a^8 + 16a^7 + 25a^9

this would be equivalent to:

a^7 * (40a + 16 + 25a^2)

expand this out again, and you get:

(a^7 * 40*a) + (a^7 * 16) + (a^7 * 25 * a^2)

a^7 * a = a^(7+1) = a^8
a^7 * a^2 = a^(7+2) = a^9

your equation becomes:

(40*a^8) + 16*a^7) + 25*a^9) which becomes:

40a^8 + 16a^7 + 25a^9

since we're back to the original equation, we're good.

RELATED QUESTIONS
I need help to factor this problem: 40a^8 + 16a^7 + 25a^9 the sign ^ means to the... (answered by Earlsdon)

Help! I need to factor completely. If a polynomial is prime, state this. {{{... (answered by checkley71,venugopalramana)

Solution or formula for doing Factoring Completely. I have 3 problems to start with as a... (answered by Alan3354)

I am having a hard time with this problem. I need to factor the following:... (answered by rothauserc)

I need help solving t^2+4t-32 and also radical 72 over radical 98 and another problem is... (answered by Alan3354)

(16a^2) * (x^2) * (y^2) - (25a^2) * (z^2) I am confused on this long equation. I can... (answered by jim_thompson5910)

OK. I need help on solving 2 step equations. My problem is: -15x=-5(3x=7) I know your... (answered by stanbon)

I'm in 6th grade and need help with adding fractions please. Thank you. 7 3/4+ 2 2/3= (answered by wilft1,solver91311)