ʀᴇꜰᴇʀ ᴛʜɪꜱ ᴀᴛᴛᴀᴄʜᴇᴅ ɪᴍᴀɢᴇ ᴘʟᴇᴀꜱᴇ ʜᴇʟᴘ ᴍᴇ
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Explanation:
a). x²-225
x²-15². (a²-b²= (a+b) (a-b)
=(x-15 ) ( x+15)
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