1)Solve the following quadratic equation by factorisation method
X
2+X-20=0
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the degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch.
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x²+x -20 =0
x² +5x -4x -20 =0
x(x+5) -4(x+5) =0
x-4=0 and x+5=0
x= 4 and x= -5
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