Question

What are the solutions(s) to the quadratic equation 40 - x2 = 0?

Answer 1

`\bf 40-x^2=0\implies 40=x^2\implies \pm√(40)=x \\\\\\ \pm√(2^2\cdot 10)=x \implies \pm 2√(10)=x`

Answer 2

Divide 40 and 20 by 2, the 2 cancels out, bring down the variable, 20= 0