Answer:
1. -3
2. 3
3. 18
4. -2
5. -2.72
Step-by-step explanation:
1. f(x)= 2x²+x-3
f(0)
f(0)=2.0²-3
2x0-3
=-3
2. f(-2)=2(-2)²-2-3
2x(-2)²-2-2x2²-2-3
2x4-2-3
8-2-3
=3
3. f(3)=2.3+3-3
2x3³+3-3
2x3²
2x9
=18
4. f(2-¹)=2.2(2-¹)+2-¹–3
2x(2-¹)²+2-¹–3
2x(1/2)²+ 1/2–3
2x1/2 + 1/2 –3
(1/2+1/2)–3
1+1/2-3
2/2-3
1-3=–2
5.F(0.2)=2.0.2²+0.2-3
2x0.2²+0.2–3
2x0.04+0.2–3
0.08+0.2-3=–2.72
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Answers & Comments
Answer:
1. -3
2. 3
3. 18
4. -2
5. -2.72
Step-by-step explanation:
1. f(x)= 2x²+x-3
f(0)
f(0)=2.0²-3
2x0-3
=-3
2. f(-2)=2(-2)²-2-3
2x(-2)²-2-2x2²-2-3
2x4-2-3
8-2-3
=3
3. f(3)=2.3+3-3
2x3³+3-3
2x3²
2x9
=18
4. f(2-¹)=2.2(2-¹)+2-¹–3
2x(2-¹)²+2-¹–3
2x(1/2)²+ 1/2–3
2x1/2 + 1/2 –3
(1/2+1/2)–3
1+1/2-3
2/2-3
1-3=–2
5.F(0.2)=2.0.2²+0.2-3
2x0.2²+0.2–3
2x0.04+0.2–3
0.08+0.2-3=–2.72