Selina solutions

# Question 1

Q1) Fill in the blanks:

(i) 8x + 5x =...........

(ii) 8x - 5x = ...........

(iii) 6xy^2+9xy^2\ =\ ...........

(iv) 6xy^2-9xy^2\ = ...........

(v) The sum of 8a, 6a and 5b = ...........

(vi) The addition of 5, 7xy, 6 and 3xy = ...........

(vii) 4a + 3b - 7a + 4b = ........... _

(viii) -15x+13x + 8 = ...........

(ix) 6x^2y+13xy^2-4x^2y\ +2xy^2= ...........

(x) 16x^2-9x^2\ =\ ........... and 25xy^2-17xy^2\ =\ ...........

Solution 1:

(i) 8x + 5x = 13x

(ii) 8x - 5x = 3x

(iii) 6xy^2+9xy^2=15xy^2

(iv) xy^2-9xy^2=3xy^2

(v) The sum of 8a, 6a and 5b = 14a + b

(vi) The addition of 5, 7xy, 6 and 3xy = 11 + 10xy

(vii) 4a + 3b - 7a + 4b = 7b - 3a

(viii) -15x+13x + 8 =8 - 2x

(ix) 6x^2y+13xy^2-4x62y+2xy^2=2x^2y\ +\ 15xy^2

(x) 16x^2-9x^2=7x^2 and 25xy^2-17xy^2=8xy^2

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