# The algebraic expression 5x4 – 145x2 + 500 can be factorised as (A) $5\left(x-2\right)\left(x+2\right)\left({x}^{2}+25\right)$ (B) $5\left({x}^{2}+16\right)\left(x-5\right)\left(x+5\right)$ (C) $5\left(x-4\right)\left(x+4\right)\left(x-5\right)\left(x+5\right)$ (D) $5\left(x-2\right)\left(x+2\right)\left(x-5\right)\left(x+5\right)$

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