Identify binomial and formula: Identify the binomial to be squared and the special case formula.The given expression is (3m−4)2, which is a binomial squared. The special case formula for the square of a binomial is (a−b)2=a2−2ab+b2.
Identify values of a and b: Identify the values of a and b in the binomial.In the expression (3m−4)2, a is 3m and b is 4. We will use these values in the special case formula.
Apply special case formula: Apply the special case formula to the binomial.Using the values of a and b, we expand (3m−4)2 using the formula (a−b)2=a2−2ab+b2.(3m−4)2=(3m)2−2⋅(3m)⋅4+42
Simplify the expression: Simplify the expression.Now we simplify each term:(3m)2=9m2 (since (3m)∗(3m)=9m2)2∗(3m)∗4=24m (since 2∗3∗4=24)42=16 (since 4∗4=16)So, (3m−4)2=9m2−24m+16
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