Question

Evaluate: xy²(x – 5y) + 1 for x = 2 and y = 1.

Answer 1

For x = 2 and y = 1

xy²(x – 5y) + 1

2 × 1² (2 − 5 × 1) + 1

2 × (2 − 5) + 1

2 × (−3) + 1

= −5