Use the difference of squares identity to write this polynomial in factored form 9x²-49

You put the following items into your rucksack. ham 600 g cheese 380 g tomatoes 270 g how much do all the ingredients weigh in total?

What are the soultion(s) to the quadratic equation 40- x^2=0

Find the midpoint m of z1=(8+5i) and z2=(12+3i)