a certain piece of paper has an area of 9x2+7x-30)cm^2. What are its dimensions?
+118658 a certain piece of paper has an area of 9x2+7x-30)cm^2. What are its dimensions?
\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\\ x = {-7 \pm \sqrt{49+1080} \over 18}\\ x = {-7 \pm \sqrt{1129} \over 18}\\ \)
(-7-sqrt1129)/18 = -2.2555886240457158
(-7+sqrt1129)/18 = 1.4778108462679381
so the dimensions are approx
x + 2.2555886240457158 units and x - 1.4778108462679381 units
x is a variable.
