Question

الا است


Write the pair of integer in which multiplication is (-45) and difference is 12.
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Answer 1

Answer:

suppose there are two integers x and y

x.y=-45_________(i

x-y= 12_________(ii

by using eq (ii)

x=12+y

(12-y).y=-45

12y-y^2=-45

y^2 - 12y -45=0

y^2 - 15y +3y -45=0

y(y- 15) +3(y-15)=0

(y+3)(y-15)=0

y= -3, 15

so x= 9, 27