U² + 6u - 27
u² + 9u - 3u - 27
(u - 3)(u + 9)
Answer:
17.2°
Explanations
To find angle A, use the cosine rule.
a^2 = b^2 + c^2 - 2 × a × c cos A
4^2 = 7^2 + 10^2 - 2 × 7 × 10 cos A
16 = 49+ 100 - 140 × cosA
16 = 149 - 140cosA
16- 149 = - 140cosA
-133 = - 140cosA
cosA = 133/140
cosA = 0.95
A = 17.2°
For the first question you need to find the formula for the rectangle, after you did that fill it in. and find your answer.
Answer:
(4+√142)/(3) or x=(4-√142) /3
Step-by-step explanation:
(4+√142)/(3) or x=4-√142 /3
<span>x2 − 8x + 16
= (x - 4)(x - 4)
= (x - 4)^2</span>
