19. Is (x-3) (2x+1)= x(x+5) is a quadratic equation
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Answer:
yes
as you simplyphy you will get it why
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(x-3)(2x+1)=x(x+5)
2x^2+x-6x-3 = x^2+5x
2x^2-5x-3=x^2+5x
2x^2-5x-3-x^2-5x=0
x^2-10x-3=0
yes , it is quadratic equations
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