Question

Factorise 0.8x^2 + 4x - 1800

Answer 1

The factor of polynomial is 0.8(x+50)(x-45)

Step-by-step explanation:

Given: $0.8x^2+4x-1800$

Take out 0.8 common from all three term

$\Rightarrow 0.8(x^2+5x-2250)$

$\Rightarrow 0.8(x^2+50x-45x-2250)$

$\Rightarrow 0.8[x(x+50)-45(x+50)]$

$\Rightarrow 0.8(x+50)(x-45)$

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