All categories

3 years ago

Evaluate the expression x^4+9x^2 when x=-3

Mathematics

2 answers:

aalyn [17]3 years ago

6 0

Answer:

162

Step-by-step explanation:

Step 1: Define

x⁴ + 9x²

x = -3

Step 2: Substitute and Evaluate

(-3)⁴ + 9(-3)²

81 + 9(9)

81 + 81

162

Yuliya22 [10]3 years ago

6 0

Answer:

162

Step-by-step explanation:

You might be interested in

-|-16| divided by(-8) multiplyed by25

Lynna [10]

Answer:

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Please help me out!

IgorLugansk [536]

w=7.5

Step-by-step explanation:

area of triangle is 6x5=30/2= 15 and then you divide 15 which 7.5

8 0

3 years ago

2. Simplify the following expression 1 (16 (16-12)

nikklg [1K]

Answer:

The answer is 64.

16-12=4.

4×16×1=64.

4 0

4 years ago

Read 2 more answers

When solving the equation x2 – 8x - 7 = 0 by completing the square, which equation

IgorLugansk [536]

<h3>Answer:-</h3>

Lets Solve

$\\ \rm \longmapsto \: {x}^{2} - 8x - 7 = 0 \\ \\ \rm \longmapsto \: {x}^{2} - 8 {}^{}x = 7 \\ \\ \rm \longmapsto \: 4( {x}^{2} - 8x) = 4 \times 7 \\ \\ \rm \longmapsto \: {4x}^{2} - 32x = 28 \\ \\ \rm \longmapsto \: {(2x)}^{2} - 2 \times 2x \times 8 = 28 \\ \\ \rm \longmapsto \: (2x) {}^{2} - 2 \times 2x \times 8 + {8}^{2} = 28 + {8}^{2} \\ \\ \rm \longmapsto \: {(2x - 8)}^{2} = 64 + 28 \\ \\ \rm \longmapsto \: {(2x - 8)}^{2} = 92 \\ \\ \rm \longmapsto \: 2x - 8 = \underline{ + }9.3 \\ \\ \rm \longmapsto \:2x = 8 + 9.3 \: or \: 8 - 9.3 \\ \\ \rm \longmapsto \:2x = 17.3 \:or \: - 1.3 \\ \\ \rm \longmapsto \:2x = 17.3 \\ \\ \rm \longmapsto \:x = \frac{17.3}{2} \\ \\ \rm \longmapsto x = \:8.6$

Ignore negative value

4 0

3 years ago

Evaluate cos 25o to four decimal places.

Firdavs [7]

$\tt \cos(25) = 0.991203 \: or \: 0.99$

8 0

2 years ago