if(5x-4)(3x+7)=15x²-ax-b find the value of a &b
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(5x-4)(3x+7)
=15x^2+35x-12x-28
=15x^2+23x-28
a=-23
b=28
=15x^2+35x-12x-28
=15x^2+23x-28
a=-23
b=28
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