Exercise 6C
Q1 | Ex-6C | Class 8 | S.Chand | New Learning Composite maths | chapter 6 |Factorisation of Algebraic Expressions | myhelper
Question 1
ax2 + by2 + bx2 + ay2
Sol :
=ax2+by2+bx2+ay2
=(a+b)(x2+y2)
Q2 | Ex-6C | Class 8 | S.Chand | New Learning Composite maths | chapter 6 |Factorisation of Algebraic Expressions | myhelper
Question 2
my + nz + mz + ny
Sol :
=my+mz+nz+ny
=m(y+z)+n(y+z)
=(y+z)(m+n)
Q3 | Ex-6C | Class 8 | S.Chand | New Learning Composite maths | chapter 6 |Factorisation of Algebraic Expressions | myhelper
Question 3
ab – 5c + 5a – bc
Sol :
=ab+5a+5c-bc
=ab-bc-5c+5a
=b(a-c)+5(a-c)
=(a-c)(b+5)
Q4 | Ex-6C | Class 8 | S.Chand | New Learning Composite maths | chapter 6 |Factorisation of Algebraic Expressions | myhelper
Question 4
x2 + ab – ax – bx
Sol :
=x2+ab–ax–bx
Q5 | Ex-6C | Class 8 | S.Chand | New Learning Composite maths | chapter 6 |Factorisation of Algebraic Expressions | myhelper
Question 5
ab2 – bc2 – ab + c2
Sol :
=ab(b-1)-c2(b-c)
=(b-1)(ab-c2)
Q6 | Ex-6C | Class 8 | S.Chand | New Learning Composite maths | chapter 6 |Factorisation of Algebraic Expressions | myhelper
Question 6
2xw – 3 – 6x + w
Sol :
=2xw+w-3-6x
=w(2x+1)-3(2x+1)
=(2x+1)(w-3)
Q7 | Ex-6C | Class 8 | S.Chand | New Learning Composite maths | chapter 6 |Factorisation of Algebraic Expressions | myhelper
Question 7
54x + 10y – 12xy – 45
Sol :
=54x-45+10y-12xy
=9(6x-5)-2y(6x-5)
=(9-2y)(6x-5)
Q8 | Ex-6C | Class 8 | S.Chand | New Learning Composite maths | chapter 6 |Factorisation of Algebraic Expressions | myhelper
Question 8
m3 + 4m + 5m2 + 20
Sol :
=m3+5m2+4m+20
=m2(m+5)+4(m+5)
=(m2+4)(m+5)
Q9 | Ex-6C | Class 8 | S.Chand | New Learning Composite maths | chapter 6 |Factorisation of Algebraic Expressions | myhelper
Question 9
2axy2 + 10x + 3ay2 + 15
Sol :
=2axy2+10x+3ay2+15
=ay2(2x+3)+5(2x+3)
=(ay2+5)(2x+3)
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