MaylaniT174871
MaylaniT174871
30-10-2022
Mathematics
contestada
dentify the factors of x2 − 4x − 21.
Respuesta :
PetraI364177
PetraI364177
30-10-2022
SOLUTION
Identify the factors of x2 − 4x − 21.
[tex]x^2-4x-21[/tex]
Factorise the equation
[tex]\begin{gathered} x^2-4x-21 \\ x^2+3x-7x-21 \\ x(x+3)-7(x+3) \\ (x+3)(x-7) \end{gathered}[/tex]
The solutions of the equation
[tex](x+3)(x-7)[/tex]
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