Hello :
by identity : (a-b)² = a² +b² -2ab
(x√7-3√8)(x√7-3√8) = (x√7-3√8)² = (x√7)²+(3√8)² -2(x√7)(3√8)
=7x²+72 -6x√56
= 7x²+72-6x√(14×4)
= 7x²+72-12x√(14).because :√(14×4)=2√14
Answer B
Answer:
800
Step-by-step explanation:
You do 2 to the 5 power, which equals 32. Then add 13 and 12 to get 25. Then multiply 32 and 25 to get 800
Answer:
36 seconds
Step-by-step explanation:
Answer:
the answer is 8x^2+xy-15y^2
Answer:
28.26 cm²
Step-by-step explanation:
Area of a circle = πr²
r = diameter/2
r = 6/2 = 3
A = (3.14)(3)²
A = 28.26 cm²
