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(√5-3)² = 5 -2*3*√5 +9 =14 - 6√5
e)
(√3+√2)² = 3+2*√3*√2+2=5+2√6
f)
(√3-2√2)² = 3 - 2*√3*2√2+ 4*2 = 11 - 4√6
cw.
(4x-1)² = (4x)² - 2*4x*1 + 1 = 16x² - 8x + 1