Question

find the zero of

x²-21x-100​

Answer 1

${x}^{2} - 21x - 100 = 0 \\ \\ {x}^{2} - 25x + 4x - 100 = 0 \\ \\ x(x - 25) + 4(x - 25) = 0 \\ \\(x + 4)(x - 25) = 0 \\ \\ x + 4 = 0 \: or \: x - 25 = 0 \\ \\ x = - 4 \: or \: x = 25$

Two zeroes of given quadratic equation are (-4 , 25).

Hope it helps u...❤