Answer:
D
Step-by-step explanation:
So we have the expression:
Combine like terms:
Add or subtract:
Simplify:
Our answer is D
a+b = 7
ab =12
we know that
a and b = ab – a+b
= 12 –7
= 5 ans
340
860 ÷ 2 = 430
430 - 90 = 340