Question Simplify the expression −s2−t2 Evaluate r−s×s−t×t−rMultiply the terms r−s2−t×t−rMultiply the terms r−s2−t2−rThe sum of two opposites equals 0 More Steps Evaluate r−rCollect like terms (1−1)rAdd the coefficients 0×rCalculate 0 0−s2−t2Solution −s2−t2 Show Solution