Question

if x+y= 1 and xy= -12;find (i)x-y (ii)x^2-y^2
pls give ans with method​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

xy=-12

or x=-12/y

put in 1

-12/y+y=1

or y²-y-12=0

ie y²-4y+3y-12=0

(y-4)(y-3)

ie y=3,4

& x=-2,-3

now x-y=-5 or -7

& x²-y²=-5 or -7