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3 years ago

0=(1x+1)(1x-3) if m(x) =10, find the value of x

Mathematics

1 answer:

Anna11 [10]3 years ago

6 0

Answer:

x=1+sqrt(14) & 1-sqrt(14).

Step-by-step explanation:

(1x+1)(1x-3)=0

(x+1)(x-3)=0

m(x)=(x+1)(x-3)=10

(x+1)(x-3)=10

x^2+x-3x-3=10

x^2-2x-3=10

x^2-2x-3-10=0

x^2-2x-13=0

Apply the quadratic formula with a=1, b=-2 and c=-13.

The answer is x=1+sqrt(14) & 1-sqrt(14).

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Also, he sells new drones at 15% more of the price (x).

So, the selling price of a new drone is:

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Express percentage as decimal

$\mathbf{New= (1 + 0.15) \times x}$

$\mathbf{New= 1.15 \times x}$

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The amount saved is the difference between the prices of the drones.

So, we have:

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Express as a function

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