book Maths Puzzle Numerical Ability

If 4aČ-bČ=54, then 4(2a+b)(2a-b)= ?

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(8x+2y)-(5x+4y) my questions please send a.s.a.p.
1) Is every squar a rectangle? true or false

2) Is every parallelogram a quadrilateral?

3) Is every rhombus a rectangle?

4) Is every p