anonymous
  • anonymous
factors of 3528 that add up to 23?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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myininaya
  • myininaya
so we have xy=3528 and x+y=23. solve the sum for either x or y
myininaya
  • myininaya
if you solve for y: y=23-x, so xy=x(23-x)=3528
myininaya
  • myininaya
but now we have -x^2+23x=3528 so we didn't get anywhere because we still have to come up with factors of 3528 that add up to be 23. Do you know the quadratic formula?

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More answers

anonymous
  • anonymous
its a trinomial. i have to factor it, but i couldnt find any thing to pull out. heres the equation: \[63a^2+23ab-56b^2\]
myininaya
  • myininaya
oh factors of -3528 that add up to be 23 one sec
myininaya
  • myininaya
ok so i normally make a little tree and move numbers around and I got 72(-49)=-3528 and 72+(-49)=23
anonymous
  • anonymous
ohhhh okay i see what i did wrong. having the negative right?
myininaya
  • myininaya
right
anonymous
  • anonymous
okayy i see, thank you!
myininaya
  • myininaya
np
anonymous
  • anonymous
so when i do it i write it as...
anonymous
  • anonymous
\[63a^2+79ab-41ab-5b^2\]
myininaya
  • myininaya
63a^2+72ab-49ab-5b^2 or 63a^2-49ab+72ab-5b^2
anonymous
  • anonymous
okay cool, thanks!
myininaya
  • myininaya
well that 5 is suppose to be 56 in both cases

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