Find two integers whose sum is -7 and whose product is 12
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Let those two integers be 'x' and 'y'
Given that :
x + y = -7
》x = -7 - y-----------(1)
and ,
xy = 12-----(2)
(1) in (2) ===》
(-7 - y ) y = 12
= -y^2 -7y -12 = 0
= y^2 + 7y + 12 = 0
= y^2 + ( 3+4) y + 3×4
Factors = (x+4)(x+3)
x = -3 , -4
Therefore we get that those two integers are -3 and -4
Let those two integers be 'x' and 'y'
Given that :
x + y = -7
》x = -7 - y-----------(1)
and ,
xy = 12-----(2)
(1) in (2) ===》
(-7 - y ) y = 12
= -y^2 -7y -12 = 0
= y^2 + 7y + 12 = 0
= y^2 + ( 3+4) y + 3×4
Factors = (x+4)(x+3)
x = -3 , -4
Therefore we get that those two integers are -3 and -4
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