If ( 5x - 4 ) ( 3x + 7 ) = 15x^2 - ax - b, then find the value of a and b.
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Answered by
13
(5x -4) (3x+7)
15x^2 + 35x -12x -28
15x^2 +23x - 28_______(1)
so , by equating the equation (1) with the given equation - 15x^2 -ax -b
15x^2 +23x -28 = 15x^2 -ax - b
23x = -ax
a=-23
and
-28 = -b
b = 28
a = -23 and b =28.
15x^2 + 35x -12x -28
15x^2 +23x - 28_______(1)
so , by equating the equation (1) with the given equation - 15x^2 -ax -b
15x^2 +23x -28 = 15x^2 -ax - b
23x = -ax
a=-23
and
-28 = -b
b = 28
a = -23 and b =28.
Answered by
6
(5x-4)(3x+7)=15x²-ax-b
15x²+35x-12x-28=15x²-ax-b
15x²+23x-28=15x²-ax-b
Comparing on both sides we get,
a=-23 and b=28
Hence value of a=-23 and b=28
15x²+35x-12x-28=15x²-ax-b
15x²+23x-28=15x²-ax-b
Comparing on both sides we get,
a=-23 and b=28
Hence value of a=-23 and b=28
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