exam Maths Puzzle Numerical Ability

I am having problems with these problems.
solve the following equations by factoring or by any of the techniques.


(x-1)^2=7 and also X^2-9x-4=6


Thanks a million

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exam Other Question

can you help me solve this problem
-2<2x+1
When a square is divided by a diagonal it is ?
a. an isosceles acute triangle is formed
b. an equilateral triangle is formed
c. a scalene obtuse triangle is formed
d. a right isosceles triangle is formed