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Tcecarenko [31]
3 years ago
14

Factorise the following 4(x-1)²-9 need solution

Mathematics
1 answer:
kumpel [21]3 years ago
6 0

Answer:x= 5/2 x= -1/2


Step-by-step explanation:

4(x-1)2-9

4(x2-2x+1) - 9

4x2 - 8x + 4 - 9

4x2 - 8x - 5

4x2 +2x - 10x - 5

2x(2x+1) - 5(2x+1)

(2x-5)(2x+1)

therefore, x= 5/2 x= -1/2




mark brainliest plzz

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What u isf(x)=x^2-10x+24?
pentagon [3]
F(x) = x² - 10x + 24
opens up because coefficient of x² is positive
crosses x-axis at x = 6 and x = 4 
crosses y-axis at y = 24
vertex is a minimum at (5, -1)
3 0
3 years ago
Determine whether the vectors u and v are parallel, orthogonal, or neither.
Radda [10]
To check if two vectors are orthogonal(perpendicular), simply check their dot product, if their dot product is 0, then they're perpendicular, let's check.

\bf \ \textless \ 7,-4\ \textgreater \ \cdot \ \textless \ -28,16\ \textgreater \ \implies (7\cdot -28)+(-4\cdot 16)\implies -196-64
\\\\\\
\boxed{-264}\impliedby \textit{nope, no orthogonal}

to check if two vectors are parallel, simply check their slope by doing a b/a check, if the slopes are the same, then they're indeed parallel to each other, let's check.

\bf \textit{slope of \underline{u} }\cfrac{7}{-4}\implies \boxed{-\cfrac{7}{4}}\qquad \qquad \textit{slope of \underline{v} }\cfrac{-28}{16}\implies \boxed{-\cfrac{7}{4}}

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4 0
4 years ago
What is the length of bc in the right triangle below? ​
Nadusha1986 [10]

Answer: A) 15

Step-by-step explanation:

Because of Pythagorean Theorem, 9^2+12^2=BC^2.  Thus, 81+144=BC^2.  Thus, 225=BC^2.  Thus, 15=BC.

Hope it helps, and ask if you want further clarification <3

4 0
4 years ago
The mass of Mars is 6.42x10-23 kilograms. The mass of mercury is 3.3x10-23 kilograms. What is the combined mass in scientific no
Paraphin [41]

  • <em>combined mass in scientific notation can be written as</em> 97.2×10^{-24}  kg

  • Scientific notation can be regarded as a way of writing very large as well as  very small numbers.

Mars of mass= (6.42x10^{-23} kg )

Mercury= (3.3x10^{-23} kilograms)

Then we add together

(6.42x10^{-23} )+ (3.3x10^{-23}) kilograms.

= 9.45 × 10^{-24} kilograms

Therefore, combined mass in scientific notation can be written as 97.2× 10^{-24} kg

Learn more at : brainly.com/question/1705769?referrer=searchResults

8 0
3 years ago
If (7^0)^x = 1, what are the possible values of x? Explain answer please
ella [17]
Anything to the 0 power is 1
and 1 to the any power is 1
so x can be any number
3 0
3 years ago
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