The area of a rectangle is 21 cm², if one side exceeds the other by 4 cm ,find the dimensions of the rectangle.
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Answer:
x² + x - 7 =0
Step-by-step explanation:
area of rectangle = l *b
l = x
b= x+4
area = 21
area of rectangle = l *b
21 = (x)*(x+4)
21 = x² +4x
21 /4 = x² + x
7 = x² + x
x² + x - 7 = 0
not confirmed
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