To solve this expression, we simply have to substitute in the given values for a and b into the expression. This means we should replace every a with a 9 and every b with a 4, and then simplify from there. This is modeled below:
b(a+b) + a
4(9+4) + 9
To simplify, we must use the order of operations, which is outlined by PEMDAS. This states that we should simplify what is in parentheses first, then exponents next, after that multiplication and division, and finally addition or subtraction. This lets us know that we should solve what is in the parentheses first in our example.
4(9+4) + 9
4(13) + 9
Because the 4 and 13 are being multiplied together, we should compute that next because it is the next letter in PEMDAS in the expression.
52 + 9
Finally, we can add these two numbers together to find our answer.
61
Therefore, your answer is 61.
Hope this helps!
