Question 1195786
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area = 0.5*base*height
area = 0.5*(x+2)*(x+9)
area = 0.5*(x^2+9x+2x+18) ... use the FOIL rule
area = 0.5*(x^2+11x+18)
area = 0.5x^2+5.5x+9


Side notes:
0.5 = 1/2
5.5 = 11/2
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