cusalo23
cusalo23
08-06-2020
Mathematics
contestada
What is the answer to 3x^2 +30x+75
Respuesta :
mg65876
mg65876
08-06-2020
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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