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Answer: 
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Given: 
Find: 
Solution: It looks like 2 is at the end of the parenthesis where the power would be instead of distributing the number. If so the following steps would be followed.
<u>Expand</u>
<u>Simplify</u>
Therefore, after following the provided information we are able to determine that the expanded form would be 9x^2 - 12x + 4.
Answer:
(-b±√(b²-4ac))/(2a)
where,
ax²+bx+c=0
a, b, c = constants, where a ≠ 0
x = the unknown
Step-by-step explanation:
Answer: equilateral
Step-by-step explanation:
A² = c² - b²
a² = 21² - 13 ²
a² = 441 - 169
a² = 272
a = √272 = 16.49242 ≈ 16.49
Answer : D ) 16.49