Trying to find the zeros of: f(x) = 2x(squared) -3x - 20 HW checker is wrong, it's telling me 5/2*-4=-20, and it's obviously -10. What's going on??

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i dont know whats goin on but i can write u the solution2x^2 - 3x - 20 = 0or, 2x^2 - 8x + 5x - 20 = 0or, 2x(x - 4 ) + 5 (x - 4) = 0or, (2x+5)(x-4) = 0thus, x = -5/2 and 4i didnt quite understand wht happened wid hw checker, but -10 is definately not the answer. u should send brightstorm a message and tell them about this.