Question

solve X2 - 15 x + 54 =0 by factorisation



Mr rider 46​

Answer 1

$how \: to \: solve \: your \: problem$

$2−15+54=0$

$=−±2−4√2</p><p></p><p>x=\frac{-{\color{#e8710a}{b}} \pm \sqrt{{\color{#e8710a}{b}}^{2}-4{\color{#c92786}{a}}{\color{#129eaf}{c}}}}{2{\color{#c92786}{a}}}x=2a−b±b2−4ac</p><p>$

$2−15+54=0</p><p></p><p>x^{2}-15x+54=0x2−15x+54=0</p><p></p><p>=1</p><p></p><p>a={\color{#c92786}{1}}a=1</p><p></p><p>=−15</p><p></p><p>b={\color{#e8710a}{-15}}b=−15</p><p></p><p>=54$

$=−(−15)±(−15)2−4⋅1⋅54√2⋅1</p><p></p><p>x=\frac{-({\color{#e8710a}{-15}}) \pm \sqrt{({\color{#e8710a}{-15}})^{2}-4 \cdot {\color{#c92786}{1}} \cdot {\color{#129eaf}{54}}}}{2 \cdot {\color{#c92786}{1}}}x=2⋅1−(−15)±(−15)2−4⋅1⋅54$