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bulgar [2K]
3 years ago
5

Factorise completely 12xy - 3x^2​

Mathematics
2 answers:
Dafna11 [192]3 years ago
7 0
12xy -3x^2

*Step 1*
Find at the common terms in both
Both have x and 3 common
= 3x(4y - x)
LUCKY_DIMON [66]3 years ago
4 0

Step-by-step explanation:

We need to factorise 3x

2

−12xy

Here we can take 3x common.

Thus we have 3x

2

−12xy=3x(x−4y)

Hence, factors are 3x,(x−4y).

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a = 162

Step-by-step explanation:

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Given 5n² + 6n + 7 = n² - 4n : a. Find the value of the discriminant. b. State the number and type of roots/solutions/zeros.[2 r
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\bf 5n^2+6n+7=n^2-4n\implies 5n^2+6n+7-n^2+4n=0
\\\\\\
4n^2+10n+7=0\\\\
-------------------------------\\\\
\begin{array}{llccll}
&{{ 4}}x^2&{{ +10}}x&{{ +7}}\\
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\end{array}
\\\\\\
discriminant\implies b^2-4ac=
\begin{cases}
0&\textit{one solution}\\
positive&\textit{two solutions}\\
negative&\textit{no solution}
\end{cases}

if you get a positive value, that means 2 real solutions
if you get 0, means 1 real solution only
if you get a negative value, is an imaginary root solution, same as saying no solution.
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3 years ago
A scale model of a building 6 inches wide and 14 inches tall. If the original building is 21 feet tall, how wide is the building
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Step-by-step explanation:

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