(x2 + 26x +) : syntax error.
x2 + 26x
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x2+26x = 68 Completing the square: (x+13)2-169-68 = 0 (x+13)2-237 = 0 x+13 = -/+ sq rt 237 x = -13-/+ sq rt 237
x2 + x2 + x2 = (1 + 1 + 1)x2 = 3x2
2x4 - 26x2 + 72 = 0Divide each side by 2:x4 - 13x2 + 36 = 0(x2 - 9) (x2 - 4) = 0A). x2 - 9 = 0B). x2 - 4 = 0______________________A). (x + 3) (x - 3) = 0x = +3x = -3B). (x + 4) (x - 4) = 0x = +4x = -4
3x4 plus 5x3 plus x2 - 5 divided by x 2 =[(3x4) + (5x3) + (x2 - 5)]/x2 =(12 + 15 + x2 -5)/x2 =(27 - 5 + x2)/x2 =(22 + x2)/x2
x2 + 63