exam Maths Puzzle Numerical Ability

Can you please help me factor this expression?
Nine x to the two seventh power minus five x to the negative four seventh power.

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exam Other Question

find all the zeros for f(x)=x to the fourth power - 6 times x to the third power + 9 times x to the second power + 6 times x - 10 if one zero is 3-i I am stuck can someone help?

Solve the following equations

{{{a-1 over a^2 - 4 plus 1 over a - 2 equals a + 4 over a + 2}}}

{{{x^2 + 7x + 12 over 2x + 6 times x over x^2 -