-(ii)(2x+5)^(2)-(2x-5)^(2)

Simplify (2x+5)^2-(2x-5)^2

Which of the following is a quadratic equation? (i) x^(2)+2x+1=(4-x)^(2)+3 (ii) -2x^(2)=(5-x)(2x-(2)/(5)) (iii) (k+1)x^(2)+(3)/(2)x=7" wherek"=-1 (iv) x^(3)-x^(2)=(x-1)^(3)

Which of the following is a quadratic equation? (i) x^(2)+2x+1=(4-x)^(2)+3 (ii) -2x^(2)=(5-x)(2x-(2)/(5)) (iii) (k+1)x^(2)+(3)/(2)x=7" wherek"=-1 (iv) x^(3)-x^(2)=(x-1)^(3)

Find each of the following products: (i) (x + 3) (x - 3) (ii) (2x + 5)(2x - 5) (ii) (8 + x)(8 - x) (iv) (7x + 11y) (7x - 11y) (v) (5x^(2) + (3)/(4) y^(2)) (5x^(2) - (3)/(4) y^(2)) (vi) ((4x)/(5) - (5y)/(3)) ((4x)/(5) + (5y)/(3)) (vii) (x + (1)/(x)) (x - (1)/(x)) (viii) ((1)/(x) + (1)/(y)) ((1)/(x) - (1)/(y)) (ix) (2a + (3)/(b)) (2a - (3)/(b))

((5x+2)^(2)+(5x-2)^(2))/((5x+2)^(2)-(5x-2)^(2))=(13)/(12) then find x

Write the degree of each of the following polynomials: 2x^(2)+5x^(2)-7 (ii) 5x^(2)-3x+22x+x^(2)-8

Expand : (i) (3a-5b)^(2) " " (ii) (a+(1)/(a))^(2) " " (iii) (2x-(a)/(2x))^(2) .

Expand : (i) (3a-5b)^(2) " " (ii) (a+(1)/(a))^(2) " " (iii) (2x-(1)/(2x))^(2) .

Find the roots of the following quadratic equations by factorisation method : (i) 2x^(2)+(5)/(3)x-2=0 (ii) (2)/(5)x^(2)-x-(3)/(5)=0 (iii) 3sqrt2x^(2)-5x-sqrt2=0 (iv) 3x^(2)+5sqrt5x-10=0 (v) 21x^(2)-2x+(1)/(21)=0