Answer:
When raising an expression of that format to any power, after grouping like terms, you'll always find that the odd numbered terms are positive, and the even numbered terms are negative.
For example:
(x - y)² = x² − 2xy + y²
(x - y)³ = x³ − 3x²y + 3xy² − y³
(x - y)⁴ =x⁴ − 4x³y + 6x²y² − 4xy³ + y⁴
etc.
3 cm base 4 cm height
Step-by-step explanation:
Answer: she is 60 years old because 48+12=60 yrs old now
x+y+5=0
the intersection of x-2y=0 and 3x+y+5 is (;)
=> the line : x+y+5=0