Question 1005954
Use ^ (Shift 6) for exponents.
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Solve the equation 5(x^2 - 20) = 2x(3+x) - 40
5x^2 - 100 = 6x + 2x^2 - 40
3x^2 = 6x + 60
x^2 - 2x - 20 = 0
*[invoke solve_quadratic_equation 1,-2,-20]