Advertisements
Advertisements
Question
Find the sum of: 4x3 + 2x2 – x + 1, 2x3 – 5x2 – 3x + 6, x2 + 8 and 5x3 – 7x
Advertisements
Solution
4x3 + 2x2 – x + 1, 2x3 – 5x2 – 3x + 6, x2 + 8 and 5x3 – 7x
4x3 + 2x2 – x + 1 + 2x3 – 5x2 – 3x + 6 + x2 + 8 + 5x3 – 7x
= 4x3 + 2x3 + 5x3 + 2x2 - 5x2 + x2 - x - 3x - 7x + 1 + 6 + 8
= 11x3 + 3x2 - 5x2 - 11x + 15
= 11x3 - 2x2 - 11x + 15
APPEARS IN
RELATED QUESTIONS
Identify the terms, their coefficients for the following expressions.
0.3a − 0.6ab + 0.5b
Group the like term together: ab, – a2b, – 3ab, 5a2b and – 8a2b
Find the sum of: 9x2 – 6x + 7, 5 – 4x and 6 – 3x2
Find the sum of: x and 3y
Find the sum of: -2a and +5
Subtract the second expression from the first:
x + 2y + z, - x - y - 3z
The factors of x2 – 4 are ______.
Area of a rectangular plot with sides 4x2 and 3y2 is ______.
Factorisation of – 3a2 + 3ab + 3ac is 3a(– a – b – c).
Identify term which contain x and give the coefficient of x.
12xy2 + 25
