(4x-8)2 = (4x-8)(4x-8) = 16x2-32x-32x+64 = 16x2-64x+64
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(4x ^2 + 3) + (3x ^2 + 8) = ( 4x^2 + 3x^2 ) + (3+8) = 7x^2 + 11
-1
4x2-20+25 = (2x-5)(2x-5) when factored with the help of the quadratic equation formula.
4x + 20
2x^8 x 3x^2 x -4x = -24x^11