3. Factorize the following quadratic trinomial expressions:
(a) x
2
+ 11x + 30
(b) 18x2
+ 3x – 10
(c) 5(3x + y)2
+ 6(3x + y) – 8
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Answer:
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Answered by
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Step-by-step explanation:
ɢɪᴠᴇɴ : x
+x−
ᴡᴇ ᴄᴀɴ ғᴜʀᴛʜᴇʀ ᴡʀɪᴛᴇ ɪᴛ ᴀs:
x
+x−=x
−x+x−
ʙʏ ᴛᴀᴋɪɴɢ ᴏᴜᴛ ᴛʜᴇ ᴄᴏᴍᴍᴏɴ ᴛᴇʀᴍs:
x
+x−=x(x−)+(x−)
sᴏ ᴡᴇ ɢᴇᴛ,
x
+x−=(x+)(x−)
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