Evaluate x^2 +2x -4 = 0
Using the quadratic formula (-b +- sqrt(b^2 -4ac))/2a we can sub substitute a = 1, b=2 and c = -4 to solve. The answer is x = -1 +/- sqrt(5)
AC
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All answers ▸The functions f and g are such that f(x)=5x+2 and g(x)=-x-4. a) Find fg(x). b) Find ff(x). c) Solve fg(x) = ff(x).
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Find the roots of x^2+5x+4=0
solve the simultaneous equations 8x + 2y = 48 , 14x + 6y = 94