Question

To factorise x^2 + 13x + 36, we have to
1 point
try using a^2 + 2ab + b^2
split the middle term
try using a^2 - 2ab + b^2
try making it a perfect square​

Answer 1

${x}^{2} -13x+36 \\ {x}^{2} -9x-4x+36 \\ 1x(1x-9) -4(1x+9) \\ 1x(1x-9) +4(1x-9) \\ (1x+4) (1x-9)$