exam Maths Puzzle Numerical Ability

Given angle DAB and angle EBA are acute and congruent
Use indirect proof to show that line AD and line EB are not parallel

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exam Other Question

Factor: x^2+3x+2 and 72-22x+x2
I dont really understand how to factor it. Could someone maybe please explain it to me?
I have to combine if possible...Do not use a calculator or a table of square roots...Can you help me please?

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Number6
square root 5 - 3square2w - square 50w