12x + 17 - (9x - 2)
Eliminate parentheses:
12x + 17 - 9x + 2
Combine the 'x' terms:
3x +17 + 2
Combine the numerical terms:
3x + 19
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It is: 122-4*(9*-2) = 216
9x2...I guess that means 9x squared ? The problem: 9x(squared)+12x+4 Here's the answer: (3x+2)(3x+2) or even more simplified: (3x+2) squared
12x + 31 = 2x + 1710x = -14x = - 1.4
12x + 17 = 7 Subtract 17 from both sides: 12x = -10 Divide both sides by 12: x = -10/12 = -5/6
Do you mean y2=x2-12x+17 Well you take the square root from both sides to get y by itself.