Subtract. Your answer should be a polynomial in standard form. (6y^2-9y+4) -(-7y^2+5y+1)=(6y 2 −9y+4)−(−7y 2 +5y+1)=left parenth
esis, 6, y, squared, minus, 9, y, plus, 4, right parenthesis, minus, left parenthesis, minus, 7, y, squared, plus, 5, y, plus, 1, right parenthesis, equals