Question

find the zero of the polynomial x² -9x +20​

Answer 1

Answer:

4,5

${x}^{2} - 9x + 20 = 0 \\ {x}^{2} - 4x - 5x + 20 = 0 \\ x(x - 4) - 5(x - 4) = 0 \\ (x - 4)(x - 5) = 0 \\ x = 4 \: or \: x = 5$

Hope you understand it........