3 years ago

Seven less than twice a number is 21

Mathematics

1 answer:

son4ous [18]3 years ago

8 0

It is true and the answer is 14

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Factorise<br><br>a² - 144<br>Please factorise this

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$\bf\pink{(a-12)\times (a+12)}$

Step-by-step explanation:

<h2><u>Given Expression</u> :-</h2>

$\bf\blue{a^{2} - 144}$

<h2><u>Steps to factorise</u> :-</h2>

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$\longrightarrow\:\:\bf\purple{(a-12)\times (a+12)}$

(<u>Refer the attachment for graph representation</u>)

<h2><u>Graph Details</u> :-</h2>

$\bigstar\:\:\bf{y=a^{2}-144}$

$\rm{ Roots \:\:(-12,\:0)\:(12,\:0)}$

$\rm{Domain \:\:a \in {\mathbb{R}}}$

$\rm{Range \:\:y\in \bigg( -144,\:+\infty \bigg) }$

$\rm{Minimum \:\: (0,\:-144)}$

$\rm{Vertical\: Intercept\:\:(0,\:-144)}$

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