Rewrite the equation by completing the square. x2 – 2x + 1 = 0
1 answer:
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Answer:
The expression that could be used is (-4)(3) + (-4)() ⇒ B
Step-by-step explanation:
Let us revise the distributive property:
<em>The product of a number and the sum of 2 other numbers equal to the sum of the products of the number with the other 2 numbers</em>
- a(b + c) = ab + ac
We will use this rule to solve the question
∵ The product of -4 and 3 = -4 × 3
→ We can right 3 as (3 +
)
∵ 3 = (3 +
)
∴ -4 × 3 = -4(3 +
)
→ By using the rule above
∵ -4(3 + ) = (-4)(3) + (-4)(
)
∴ -4 × 3 = (-4)(3) + (-4)(
)
∴ The expression that could be used is (-4)(3) + (-4)()
Answer: 5
Step-by-step explanation:
Since , by the corresponding angles theorem,
. This means
by AA.
As corresponding sides of similar triangles are proportional,
However, as distance must be positive, we consider the positive solution, x=5.
Therefore, the answer is <u>5</u>
