Answer:
=
Step-by-step explanation:
Given that:
=(1 - 3n3 + 2n4) + (8n4 – 13 – 7)
By opening the brackets we get:
= 1-3n3 +2n4 +8n4 -13 -7
By adding like terms: Constants into constants and variables with same powers of x.....
= -20 - 3n3 +10n4
So by arranging the answer in decreasing order of powers of x:
=
I hope it will help you!
Answer:
A = 18 units²
Step-by-step explanation:
The area (A) of a trapezium is calculated as
A = h ( b₁ + b₂ )
where h is the perpendicular height and b₁, b₂ the parallel bases
By counting squares
h = 3, b₁ = 3, b₂ = 9 , then
A = × 3 × (3 + 9) = 1.5 × 12 = 18 units²
Answer:
Step-by-step explanation:
You have written 3 - ((√6)/4) + √5. The only denominator is 4, which is already rational. If you were to use appropriate grouping symbols (parentheses) we might expect to see ...
(3 -√6)/(4 +√5)
The denominator is rationalized by taking advantage of the factoring of the difference of squares:
a² - b² = (a -b)(a +b)
The denominator will be rational if we can square the value √5. By choosing a multiplier of (4-√5), we can do that: