Question

Question no 8, 11, 12

Answer 1

Answer:

10. given equation:3x^2-11x-20

by factorisation method

3x^2-11x-20= 3x^2-15x+4x-20

=3x(x-5)+4 (x-5)

=(3x+4)(x-5)=0

x=-4/3. x=5

Answer 2

Answer:

11)62.49

Step-by-step explanation:

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