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s^2 +4x -21 = 0 is a quadratic equation and by using the quadratic equation formula its solutions are s = 3 or s = -7
Wiki User
∙ 6y ago
To solve the quadratic equation, S^2 + 4S - 21 = 0, you can factor the expression or use the quadratic formula. Factoring, we can rewrite it as (S-3)(S+7) = 0. This means that either S-3 = 0 or S+7 = 0. Solving for S in each case gives S = 3 or S = -7 as the solutions to the equation.
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