Question

Factorisation

Answer 1

9x^2 - 25

Answer 2

\(\bf 9x^2 - 25\qquad
\begin{cases}
9\to 3^2\\
25\to 5^2
\end{cases}\qquad thus\qquad \\ \quad \\9x^2 - 25\implies 3^2x^2-5^2\implies (3x)^2-5^2
\\ \quad \\
recall\implies \textit{difference of squares}
\\ \quad \\
(a-b)(a+b) = a^2-b^2\qquad \qquad
a^2-b^2 = (a-b)(a+b)\)

Answer 3

factor away

Answer 4

@jdoe0001 would it be (3x-5) (3x+5)

Answer 5

@jdoe0001