Write (5+2yi)(4--2yi)(4-3i) on a+bi form, where y is a real number

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Afair die is cast four times. calculate the probability of obtaining exactly two 6's round to the nearest tenth of a percent

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm2. what is the area of the second triangle?