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anonymous
 one year ago
Solve: x2  20x + 36 = 0
a: {6, 6}
b: {2, 18}
c: {4, 9}
d: no solution
anonymous
 one year ago
Solve: x2  20x + 36 = 0 a: {6, 6} b: {2, 18} c: {4, 9} d: no solution

This Question is Closed

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1you need 2 numbers a and b where a * b = +36 and a + b = 20

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1these numbers go into the binomial (x + a)(x + b) = 0 then solve for x

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1this equation will factor

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1think of the factors of +36 4 * 9 4*9 2 * 18 2 * 18 3 * 12 3*12 are some of them

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1 which of those give you 10 when added?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You have been given points in your options, you can put them in your original equation and check which one is satisfying that equation..

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[Given\ eq: \ x^220x+36\\ x^2(18+2)x+36\ [ \because 36 \times1=36=18\times 2 18+2=20]\\x^218x2x+36\\x(x18)2(x18)\\(x18)(x2)\\ \therefore\ original\ eq\ reduces\ as \ (x18)(x2)=0\\ \implies \ either\ x18=0\ or\ x2=0 \\ i.e.\ x=18 \ or\ x=2\\hence\ (b) is \ correct \ option.\]
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