Question

x2+ 12x -45 answer please

Answer 1

Answer:-

${x}^{2} + 12x - 45 \: solve \: by \: factorisation \: method \\ \\ = > {x}^{2 } + 12x - 45 \\ \\ = > {x}^{2} - ( - 15 + 3) - 45 \\ \\ = > {x}^{2} + 15x - 3x - 45 \\ \\ = > x(x + 15) - 3(x + 15) \\ \\ = >( x + 15)(x - 3) = 0 \\ \\ = > x = - 15,3 \\ \\ so \: the \: zeroes \: of \: this \: quadratic \: equation = - 15,3 \: \: \: ans.$