M l aggarwal understanding icse mathematics class 9 Solutions for Chapter 7 quadratic equations

Exercises in Chapter 7 quadratic equations Grade 9

Quadratic Equations Exercise 7

Questions in Quadratic Equations Exercise 7

$\text { (i) } x^{2}-11 x+30=0$ $\text { (ii) } 4 x^{2}-25=0$

$\text { (i) } x^{2}-11 x+30=0$

$\text { (ii) } 4 x^{2}-25=0$

$\text { (i) } x(2 x+5)=25$

(ii) (x + 3) (x – 3) = 40

$\text { (i) } 4 x^{2}+4 x+1=0$

$\text { (ii) }(x-4)^{2}+5^{2}=13^{2}$

$\text { (i) } 21 x^{2}=4(2 x+1)$

$\text { (ii) } 2 / 3 x^{2}-1 / 3 x-1=0$

(i) (x – 1)/(x + 1) = (2x – 5)/(3x – 7)

(ii) 1/(x + 2) + 1/x = ¾

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