exam Maths Puzzle Numerical Ability

i am searching for help with length vs. numbers using connecting links

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exam Other Question

y=2xsquared-8x. Find the y-intercepts and any x-intercepts. I am stuck on correct answer for:

(3 X 10^2) X (2 X 10-3)=:

The 10-3 is actually (10 to negative 3rd power) but I can't show that correctly in email.

I am not using a spec