Simplify the expression 2 ( a² + ab) + 3 -ab, and find its value, when a=5 and b= -3.
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Answer:
38
Step-by-step explanation:
Pull out like factors :
a2 + ab = a • (a + b)
Equation at the end of step 1:
(2a • (a + b) + 3) - ab
Final result :
2a2 + ab + 3
Now, we can substitute a=5 and b=-3 in the equation.
Thus,
2a²+ ab + 3
= 2(5)²+(5)(-3)+3
= 2×25+(-15)+3
= 50-15+3
= 38.
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