Answer:
Yuri is not correct.
Step-by-step explanation:
Given expression is q(x) = 6x³ + 19x² - 15x - 28
If 'a' is a root of the given function, then by substituting x = a in the expression, q(a) = 0
Similarly, for x = ,
=
=
=
=
= ≠ 0
Therefore, Yuri is not correct. x = can not be a root of the given expression.
Answer:
A).
B).
Step-by-step explanation:
A).
To get the square root of the given expression we will convert it into the square form.
[Since 2×2 = 4 and
]
Therefore,
B).
Since,
Therefore, [Since 3² = 9 and (m⁷)² = m¹⁴]
Answer:
Step-by-step explanation:
If two lines are perpendicular, they create 4 90° angles. Meaning, in this case, that m<DBC = 90 and m<DBA = 90.
We're given that m<DBE = 2x - 1 and that m<CBE = 5x - 42.
The sum of angles DBE and CBE = m<DBC = 90°
We can add the two angles and set it equal to 90 to find x