Question

please guys help me!!!!!
I will mark him or her as the brainliest!!!!!
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Answer 1

Answer:

B options is right answer

Step-by-step explanation:

please mark me as brainlist

Answer 2

$\sf \large \underbrace{ \underline{Understanding \: the \: Question}}$

Here's an expression of area of rectangle is given. As we know that area of rectangle is Length multiply by its breadth, so we can find length and breadth by just factorising the equation.

So let's start!

$\sf \large \implies x²+9x+20$

$\sf \large \implies x²+4x+5x+20$

$\sf \large \implies x(x+4)+5(x+4)$

$\sf \large \implies(x+5)(x+4)$

Hence length and breadth are (x+5)(x+4)

So option b is correct.

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$\sf \Large \underbrace{ \underline{Additional \:Information}}$

Algeberic Identities

$\boxed{\begin{minipage}{7 cm}\boxed{\bigstar\:\:\textbf{\textsf{Algebric\:Identity}}\:\bigstar}\\\\1)\bf\:(A+B)^{2} = A^{2} + 2AB + B^{2}\\\\2)\sf\: (A-B)^{2} = A^{2} - 2AB + B^{2}\\\\3)\bf\: A^{2} - B^{2} = (A+B)(A-B)\\\\4)\sf\: (A+B)^{2} = (A-B)^{2} + 4AB\\\\5)\bf\: (A-B)^{2} = (A+B)^{2} - 4AB\\\\6)\sf\: (A+B)^{3} = A^{3} + 3AB(A+B) + B^{3}\\\\7)\bf\:(A-B)^{3} = A^{3} - 3AB(A-B) + B^{3}\\\\8)\sf\: A^{3} + B^{3} = (A+B)(A^{2} - AB + B^{2})\\\\\end{minipage}}$

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