exercise 4.2 class 10 maths 1. Find the roots of the following quadratic equations by factorization. (i) x² – 3x – 10 = 0 (ii) 2x² + x – 6 = 0 (iii) √2 x² + 7x + 5√2 = 0 (iv) 2x² – x + 1/8 = 0 (v) 100x² – 20x + 1…
exercise 3.1 class 10 maths 1. Form the pair of linear equations in the following problems, and find their solutions graphically. (i) 10 students of Class X took part in a Mathematics quiz. If number of girls is 4 more than the number of boys,find the number of boys and girls who took part in…
exercise 2.2 class 10 maths 1 Find the zeroes of the following Quadratic Polynomials and verify the relationship between the zeroes and the coefficients. (i) x²-2x-8 = x²-4x+2x-8 =x(x-4)+2(x-4) =(x+2)(x-4) for finding zeores x+2=0 , x=-2 x-4=0, x= 4 so zeroes are -2,4 Verifications : Sum of zeroes = -2+ 4 = 2= -(-2)/1 =…
exercise 2.1 class 10 maths Solutions: For finding number of zeroses of polynomials from graph, we need to check that how many times the graph cuts the x-axis, that will be the number of zeroses of that polynomial (i) in this part the graph of the polynomial do not cut x-axis , so it has…
exercise 1.2 Class 10 Maths 1. Prove that √5 is irrational. Sol. Let us assume to the contrary that √5 is an irrational number. So it can be written in the form of p/q where p and q are coprime integers and q is not equal to zero. √5= p/q squaring both sides (√5)² =…
exercise 1.1 class 10 maths 1. Express each number as a product of its prime factors: (i) 140 140 = 2 x 2 x 5 x 7 = 2² x 5 x 7 (ii) 156 = 2 x 2 x 3 x 13 =2² x 3 x 13 (iii) 3825 = 3 x 3 x…
