evaluate each given expression
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Solution
1) x² - 4y
Where , x = -3 and y = -2
→ (-3)² - 4 × -2
→ 9 + 8
→ 17
2) (4a - b)/(a + b)
Where a = 6 and b = - 3
→( 4×6 -(-3))/(6 - 3)
→ (24 + 3 )/3
→ 27/3
→ 9
3) (5r)²s
Where r = -4 and s = -2
→ (5 × -4)²×-2
→( -20 )² × -2
→ 400 × -2
→ -800
4) (3m)²n³
Where m= 4 and n = -2
→( 3 × 4 )² × (-2)³
→(12)² × -8
→ 144 × -8
→ - 1152
5)x² - 4y + 5xz
Where x = 3,y = -2 and z = 4
→(3)² - 4 × -2 + 5 × 3 × 4
→9 + 8 + 60
→77
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