Answer:
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Answer:
Step-by-step explanation:
Vertically opposite angles are equal.
5x - 12 = 4x + 38
5x - 4x = 38 + 12
x = 50
7x8=56 (area of the rectangle of the “house” shape)
11-8=3
7x3=21x1/2 (how to find area of the triangle)
10.5
So the answer is 10.5 cm2 (centimeters squared)
Answer:
x = ± 3, x = ± 2i
Step-by-step explanation:
Given
f(x) = (x² + 4)(x² - 9)
To find the zeros let f(x) = 0, that is
(x² + 4)(x² - 9) = 0
Equate each factor to zero and solve for x
x² - 9 = 0 ( add 9 to both sides )
x² = 9 ( take the square root of both sides )
x = ± = ± 3
x² + 4 = 0 ( subtract 4 from both sides )
x² = - 4 ( take the square root of both sides )
x = ± = ± = ± × = ± 2i
Thus zeros are
x = - 3, x = 3 ← real
x = - 2i, x = 2i ← complex
-3 1/2 is another way it can be written