(4x+1)(4x-3)
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3(8x + 1)(8x - 1)
x2-8x+15 = (x-3)(x-5)
3 is a factor and dividing by 3 gives x + 15 = 8x
By inspection. X^2 - 8X - 33 (X - 11)(X + 3) FOIL and see. X = 11 X = - 3
hcf(6x², 8x) = 2x 6x² = 2 × 3 × x² 8x = 2³ × x → hcf = 2 × x = 2x