anonymous
  • anonymous
(-3x^2)(4x^7) And explain why please. So i know I have to add the exponents and multiply the coefficients. But when you multiply 2 x's they become squared right?
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
-12x^9?
anonymous
  • anonymous
If you had 2 x's multiplied together it would be x squared. But you already have an x squared (2 x's) if you multiply those two by 7 more, you'll have 9 x's multiplied together (x^9)
anonymous
  • anonymous
Ohh tyvm!

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anonymous
  • anonymous
Then it's just a matter of multiplying the non-variable part (-3)(4) = -12
anonymous
  • anonymous
Ohhh thanks!
anonymous
  • anonymous
you can think of it as if the x is x^1 then if you've got x*x it's like you have x^1*x^1 there for what you get is x^2
anonymous
  • anonymous
When you multiply 2 \(x\)s together, you're adding the exponents just like normal. The variable \(x\) is the same as \(x^1\). So when you multiply \(x\) by \(x\), you're really multiplying \(x^1\) by \(x^1\). When you add the exponents, you get \(x^2\).

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