We read your photo as:

The table below is for the function of y = 2x² − x − 6. a. Complete the table. b. On the grid provided, plot the graph of y = 2x² − x − 6 for −3 ≤ x ≤ 4

Mathematics

ScanSolve AI Answer

Answer

c

−1.5 na 2-1.5 \text{ na } 2

Hapa kuna suluhisho la swali lako:

a) Kamilisha jedwali

Tunatumia kazi y=2x2−x−6y = 2x^2 - x - 6 kukokotoa maadili ya yy kwa kila thamani ya xx.

  • Kwa x=−3x = -3: y=2(−3)2−(−3)−6=2(9)+3−6=18+3−6=15y = 2(-3)^2 - (-3) - 6 = 2(9) + 3 - 6 = 18 + 3 - 6 = 15
  • Kwa x=−2x = -2: y=2(−2)2−(−2)−6=2(4)+2−6=8+2−6=4y = 2(-2)^2 - (-2) - 6 = 2(4) + 2 - 6 = 8 + 2 - 6 = 4
  • Kwa x=−1x = -1: y=2(−1)2−(−1)−6=2(1)+1−6=2+1−6=−3y = 2(-1)^2 - (-1) - 6 = 2(1) + 1 - 6 = 2 + 1 - 6 = -3
  • Kwa x=0x = 0: y=2(0)2−(0)−6=0−0−6=−6y = 2(0)^2 - (0) - 6 = 0 - 0 - 6 = -6
  • Kwa x=1x = 1: y=2(1)2−(1)−6=2(1)−1−6=2−1−6=−5y = 2(1)^2 - (1) - 6 = 2(1) - 1 - 6 = 2 - 1 - 6 = -5
  • Kwa x=2x = 2: y=2(2)2−(2)−6=2(4)−2−6=8−2−6=0y = 2(2)^2 - (2) - 6 = 2(4) - 2 - 6 = 8 - 2 - 6 = 0
  • Kwa x=3x = 3: y=2(3)2−(3)−6=2(9)−3−6=18−3−6=9y = 2(3)^2 - (3) - 6 = 2(9) - 3 - 6 = 18 - 3 - 6 = 9
  • Kwa x=4x = 4: y=2(4)2−(4)−6=2(16)−4−6=32−4−6=22y = 2(4)^2 - (4) - 6 = 2(16) - 4 - 6 = 32 - 4 - 6 = 22

Jedwali lililokamilika ni:

xx-3-2-101234
yy154-3-6-50922

b) Chora grafu ya y=2x2−x−6y = 2x^2 - x - 6 kwa −3≤x≤4-3 \le x \le 4

Tumia pointi zifuatazo kutoka kwenye jedwali ili kuchora grafu kwenye gridi uliyopewa:
(−3,15)(-3, 15), (−2,4)(-2, 4), (−1,−3)(-1, -3), (0,−6)(0, -6), (1,−5)(1, -5), (2,0)(2, 0), (3,9)(3, 9), (4,22)(4, 22).
Unganisha pointi hizi kwa kutumia mstari laini ili kuunda parabola.

c) Tumia grafu yako kutatua 2x2−x−6=02x^2 - x - 6 = 0

Kutatua 2x2−x−6=02x^2 - x - 6 = 0 kwa kutumia grafu kunamaanisha kutafuta maadili ya xx ambapo y=0y = 0. Haya ni maeneo ambapo grafu inapita kwenye mhimili wa xx.
Kutoka kwenye jedwali na grafu, tunaona kwamba y=0y=0 wakati x=2x=2.
Pia, grafu inapita mhimili wa xx kati ya x=−2x=-2 na x=−1x=-1. Kwa kukadiria kutoka kwenye grafu, au kwa kutatua mlinganyo, tunapata thamani nyingine.
Kutatua mlinganyo 2x2−x−6=02x^2 - x - 6 = 0:
(2x+3)(x−2)=0(2x+3)(x-2) = 0
Hivyo, 2x+3=0⇒x=−32=−1.52x+3 = 0 \Rightarrow x = -\frac{3}{2} = -1.5
Au x−2=0⇒x=2x-2 = 0 \Rightarrow x = 2

Kwa hiyo, suluhisho kutoka kwenye grafu ni:
x=−1.5 na 2x = \boxed{-1.5 \text{ na } 2}

Was this helpful?

Try one yourself

A new problem that tests the same skill.

Still stuck on this one?

Ask a follow-up, and the answer starts from this question.

Got a different question?Ask your own question
Handwritten step-by-step solution preview

Handwritten Step-by-Step Solution

Get this as a handwritten image on WhatsApp — like a tutor wrote it for you.

Try on WhatsApp