exam Maths Puzzle Numerical Ability

Plase help me solve this problem n-40-25= -35

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exam Other Question

Use the intermediate valve theorem to determine if the polynomial f(x)=x^3-4x^+3x+2 has a zero Ci in the interval [-3,4].

a). No because f(-3)*f(4)<0
b). Yes because f(-3)*f(4)<0
c). Yes because f(-3)*f(4)>0
d). No because f(-3)*f(4)>0 Solve by completing the square.
x^2 = 5x + 2