If B, equals, minus, m, plus, 1, minus, 9, m, squaredB=−m+1−9m
2
and A, equals, m, plus, 9, commaA=m+9, find an expression that equals 2, B, minus, 2, A2B−2A in standard form.
To find an expression that equals 2B - 2A in standard form, we need to substitute the values for B and A into the expression and simplify it.
Given that B = -m + 1 - 9m^2 and A = m + 9, we can substitute these values into the expression: 2B - 2A.
2B - 2A = 2(-m + 1 - 9m^2) - 2(m + 9)
Simplifying this expression step by step:
= -2m + 2 - 18m^2 - 2m - 18
= -20m - 18m^2 - 16
Therefore, the expression that equals 2B - 2A in standard form is -18m^2 - 20m - 16.