Question Text
Question 1 :
Using $(x + a) (x + b) = x^2 + (a + b) x + ab$, find: 103 × 104
Question 2 :
State true or false: -z + 5 and ab - ac are binomials.
Question 4 :
What will be the product of first monomial $2x$ and second monomial $-9x^2y^2$ ?
Question 6 :
Use a suitable identity to get the product : $(2y + 5) (2y + 5)$
Question 8 :
Add the expression: $l^2 + m^2$ , $m^2 + n^2$ , $n^2 + l^2$ , $2lm + 2mn + 2nl$
Question 10 :
State true or false: $(a + b + c) (a^2 + b^2 + c^2 – ab – bc – ca) = a^3 + b^3+ c^3 – 3abc$
Question 11 :
State true or false. Expressions that contain exactly two terms is called binomials.
Question 12 :
Check if the following is true or false: $2ax^2 + 4axy + 3bx^2 + 2ay^2 + 6bxy + 3by^2=(2x+3)(6b+xy)$
Question 13 :
Multiply: $(a^2 + 2b^2 ) \ and \ (5a – 3b)$
Question 16 :
Use a suitable identity to get the product: $(x + 3) (x + 3)$
Question 19 :
Subtract: $3a (a + b + c ) – 2 b (a – b + c) \ from \ 4c ( – a + b + c )$
Question 20 :
Use the identities to find the product of $(4x – 5) (4x – 1)$
Question 21 :
Expression that contains only one term is called a ________ .