Q. Solve for x. Enter the solutions from least to greatest.3x2+3x−90=0 lesser x=□ greater x=□
Write Equation: Write down the given quadratic equation.3x2+3x−90=0We need to solve for x.
Factor GCF: Factor out the greatest common factor (GCF) if possible.The GCF of the coefficients 3x2, 3x, and −90 is 3. Let's factor it out.3(x2+x−30)=0
Factor Quadratic Expression: Now we need to factor the quadratic expression x2+x−30.We are looking for two numbers that multiply to −30 and add up to 1 (the coefficient of x).The numbers 6 and −5 work because 6×(−5)=−30 and 6+(−5)=1.So we can write the factored form as:3(x+6)(x−5)=0
Solve for x (Part 1): Set each factor equal to zero and solve for x.First, we set the factor x+6 equal to zero:x+6=0Subtract 6 from both sides:x=−6
Solve for x (Part 2): Set the other factor x−5 equal to zero:x−5=0Add 5 to both sides:x=5
Write Solutions: Write down the solutions in ascending order.The lesser value of x is −6, and the greater value of x is 5.
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