" 47."5x^(2)-16x-21

factorize the given expression 5x^2-16x-21

(i) 7x^(2) + 16x - 15 = 0 (ii) 5y^(2)+ 8y - 21 = 0

Solve the equation x^(3)+5x^(2)-16x-14=0 given x+7 is a root

Find the coordinates of the centre and the radius of the circles whose equations are 4x^(2)+4y^(2)-16x-12y+21=0

Find by factorization method: 6x^(2)-5x-21=0

Solve(8x^(2)+16x-51)/(2x^(2)+5x-12)>3

Multiply : 3 - (2)/(3)xy + (5)/(7)xy^(2) - (16)/(21)x^(2)y by -21 x^(2)y^(2)

Find the zeros of the polynomial f(x)=x^(3)-5x^(2)-16x+80, if its two zeros are equal in magnitude but opposite in sign.