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If a + b = 2 and 3a – b = –14, then what is ab?
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19 Jul 2019, 08:17
19 Jul 2019, 08:17
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Question Stats:
95% (00:41) correct
4% (01:17) wrong based on 88 sessions
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Re: If a + b = 2 and 3a – b = –14, then what is ab?
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19 Jul 2019, 08:24
19 Jul 2019, 08:24
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Carcass wrote:
GIVEN:
a + b = 2
3a – b = –14
ADD the two equations to get: 4a = -12
Solve: a = -3
To find the value of b, take the first given equation (a + b = 2), and replace a with -3 to get: -3 + b = 2
Add 3 to both sides to get: b = 5
So, ab = (-3)(5) = -15
Answer: -15
Cheers,
Brent
Re: If a + b = 2 and 3a – b = –14, then what is ab?
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15 Sep 2019, 16:34
15 Sep 2019, 16:34
by solving we get a= -3, b =5
ab =-15(Ans)
ab =-15(Ans)
