Factorise 4a square - 49b square

1.	Factorise 4a square - 49b square
Answer» align="absmiddle" alt="\HUGE \UNDERLINE{ \underline{ \bf \purple{Solution :}}}" CLASS="latex-formula" id="TexFormula1" src="HTTPS://tex.z-dn.net/?f=%20%5Chuge%20%5Cunderline%7B%20%5Cunderline%7B%20%5Cbf%20%20%5Cpurple%7BSolution%20%3A%7D%7D%7D%20" title="\huge \underline{ \underline{ \bf \purple{Solution :}}}"> $\longrightarrow \: \sf {4a}^{2} - {49b}^{2} \\ \\ \longrightarrow \: \sf{(2a)}^{2} - {(7b)}^{2} \\ \\ \longrightarrow \: \sf(2a + 7b)(2a - 7b)$ $\huge \underline{ \underline{ \bf \purple{Identity \: used :}}}$ $\longrightarrow \: \sf {a}^{2} - {b}^{2} = (a + b)( a-b )$

Answer»

align="absmiddle" alt="\HUGE \UNDERLINE{ \underline{ \bf \purple{Solution :}}}" CLASS="latex-formula" id="TexFormula1" src="HTTPS://tex.z-dn.net/?f=%20%5Chuge%20%5Cunderline%7B%20%5Cunderline%7B%20%5Cbf%20%20%5Cpurple%7BSolution%20%3A%7D%7D%7D%20" title="\huge \underline{ \underline{ \bf \purple{Solution :}}}">

$\longrightarrow \: \sf {4a}^{2} - {49b}^{2} \\ \\ \longrightarrow \: \sf{(2a)}^{2} - {(7b)}^{2} \\ \\ \longrightarrow \: \sf(2a + 7b)(2a - 7b)$

$\huge \underline{ \underline{ \bf \purple{Identity \: used :}}}$

$\longrightarrow \: \sf {a}^{2} - {b}^{2} = (a + b)( a-b )$

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