Solve 2x^2 + 7x-15=0
1 answer:
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From the diagram we have
Base =
Height =
Area = Base × Height
126 =
⇒ Expand the double bracket
126 =
⇒ Subtract 126 both sides
0 =
⇒ Factorise the quadratic expression
0 =
⇒ Equating each factor to zero
We need the positive value of
so we use
Height = 5+1 = 6
Base = 4(5)+1 = 21
Base =
Height =
Area = Base × Height
126 =
126 =
0 =
0 =
We need the positive value of
Height = 5+1 = 6
Base = 4(5)+1 = 21