anonymous
  • anonymous
how do you factor : 100b^2-64
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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saifoo.khan
  • saifoo.khan
(10b+8)(10b-8)
eyust707
  • eyust707
The way I do it is I remember this rule i learned a while back. If you have (perfect square A - perfect square B) it factors into (A's square + B's square)(A's square - B's square) in your example you have exactly this! 100b^2 is a perfect square because 10b * 10b = 100b^2 64 is also a perfect square because 8 * 8 = 64 So useing the rule above we get (10b + 8)(10b - 8) Hint* you can always check your answer by expanding it back out.
anonymous
  • anonymous
thanx you helped a lot now i understand! :D

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