12 = x² - x
12 - 12 = x² - x - 12
0 = x² - x - 12
x² - x - 12 = 0
x = <u>-(-1) +/- √((-1)² - 4(1)(-12))</u>
2(1)
x = <u>1 +/- √(1 + 48)</u>
2
x = <u>1 +/- √(49)
</u> 2
x = <u>1 +/- 7</u>
2
x = 0.5 +/- 3.5
x = 0.5 + 3.5 x = 0.5 - 3.5
x = 4 x = -3
<u />
To figure out the area of a parallelogram, we need to identify its formula. However, I do know the formula, which is Area = Base x Height.
Area = Base x Height
Area = 8 x 12
= 96 cm squared
Therefore, the answer it 96 cm squared. By the way, I recommend that you review and comprehend the topic regarding area. Try memorizing all formulas for the shapes.
Rectangle & Square: Area = length x width
Triangle: Area = <u>base x height</u>
2
Trapezoid: Area = <u>(Base 1 + Base 2) x h </u>
2
Pararellogram: Area = base x height
Circle: Area = pi x r sqaured
Those are all the formulas I can recall; however, there might be more.
<u><em>20</em> palindromes exist that qualify this criteria rigorously</u>
Examples:
52025, 52125, 52225, 52325, 52425, 52525, 52625, 52725, 52825, 57975 etc.
