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Alivia Soto
Mathematics
13 March, 09:35
What is the answer to 3x^2 + 30x+75
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Sanaa
13 March, 09:59
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The answer is 3 (x+5) ^2
Factor out 3 from the original equation
3 (x^2+10x+25)
Then find two numbers that multiply to give 25 and add to give 10. The two numbers are 5 and 5
This gives ...
3 (x^2+5x+5x+25)
Factorise the expression in the brackets
3 (x+5) (x+5)
Combine like terms
3 (x+5) ^2
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