factorise:- 9x²+16y²+25z²+24xy+40yz+30zx
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Answer:
(3x + 4y + 5z)²
Step-by-step explanation:
= 9x²+16y²+25z²+24xy+40yz+30zx
= (3x)²+(4y)²+(5z)²+2.3x.4y+2.4y.5z+2.5z.3x
= (3x + 4y + 5z)²
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