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Do a few questions, factoring and so on X3-9x = 16x fourth power - 1 = 2x2 + 4x + 2 = 2A - (a + b) (a-b)= 3a2b(2a－3b2)= (-1＋2a)2= (a+b)2-(a-b)2= （x-2y+4）(x-2y-4)= -a2+81= ay2-2a2y+3= 9y3-2y= Calculate the value of (2-A) (a + 2) + (- b-2) (2-B), where a = √ 2, B = 2 √ 2
X3-9x = - 6x 16x quartic power - 1 = (4x & sup2; + 1) (2x-1) (2x + 1) 2x2 + 4x + 2 = 2 (x + 1) & sup2; 2A - (a + b) (a-b) = B & sup2; - A & sup2; + 2A 3a2b (2a-3b2) = 6A & sup3; b-9a & sup2; B & sup2; (- 1 + 2a) 2 = 4A & sup2; - 2A + 1 (a + b) 2 - (a-b) 2 = 2A & sup2; + 2B & sup2
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