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anonymous
 5 years ago
(1/x1)+(1/x12)=5/4
anonymous
 5 years ago
(1/x1)+(1/x12)=5/4

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0(1/x1)+(1/x12)=5/4 we multiply x12/x12 to (1/x1) and x1/x1 to (1/x12) this is possible since x12/x12 and x1/x1are both equal to 1 (1/x1)(x12/x12) + (1/x12)(x1/x1) = 5/4 (x12/x1*x12) + (x1/x1*x12) = 5/4 since the denominators are equal we add the numerators x12+x1/x1*x12=5/4 \[2x13/x ^{2}13x+12\] =5/4 then we cross multiply, 4(2x13)=5(\[x ^{2}13x+12\]) 8x52 = \[5x ^{2}65x+60\] \[5x ^{2}65x+60\]8x+52= 0 \[5x ^{2}73x+112\] = 0 in a quadratic equation in the form \[ax ^{2}+bx+c=0\].\[(b \pm \sqrt{b ^{2}4ac})\div2a\] gives the two solutions of x. if you solve the formula the two solutions are 12.85 and 1.74 (you can try it out in a calculator) hope this helps
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