Question

Factorise 2x^2-2√2x-15

Answer 1

2√2 can be written as 8

then 2x^2-8x-15

Answer 2

Answer:

Step-by-step explanation:

$2x^{2} -2\sqrt{2} x-15\\=2x^{2} -5\sqrt{2}x+3\sqrt{2}x-15\\=\sqrt{2}x(\sqrt{2}x-5 ) +3(\sqrt{2}x-5)\\=(\sqrt{2}x-5)(\sqrt{2}x+3)$