" (i) "x^(2)-9=0

If A={1,2} and B={x:x in N,x^(2)-9=0} Find A uu B and A nn B

Solve : (i) |x^(2)-2x|le x , (ii) (x^(2)-9)(|x|-2)le0

Is 0.3 a root of the equation x^(2)-0.9=0 ? Justify.

If alpha,beta,gamma,delta are the roots of the equation 3x^(4)-8x^(3)+2x^(2)-9=0 then sum alpha beta=

Analyze the roots of the following equations: (i) 2x^(3) - 9x^(2) + 12x - (9//2) = 0 (ii) 2x^(3) - 9x^(2) + 12x - 3 = 0

Suppose that two persons A and B solve the equation x^(2)+ax+b=0 . While solving A commits a mistake in constant term and find the roots as 6 and 3 and B commits a mistake in the coefficient of x and finds the roots as -7and-2 .Then , the equation is a) x^(2)+9x+14=0 b) x^(2)-9x+14=0 c) x^(2)+9x-14=0 d) x^(2)-9x-14=0

Solve the following quadratic equations by factorization method: x^(2)-9=0 (ii) x^(2)-8x+16=0