If one root of the equation 2x^2 + 10x + k = 0 is -2, what is the other root?
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Plug in -2 for x and solve for k: For a quadratic equation the sum of the two roots (I'll call them r1 and r2) is -b/a: So the other root is -3.
Originally Posted by MATNTRNG If one root of the equation 2x^2 + 10x + k = 0 is -2, what is the other root? The roots are For one of these to be Therefore the other root is
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