1. (2x - 5) (4 + 5)
= 2x(4 + 5) - 5(4 + 5)
= 8x + 10x - 20 - 25
= 18x - 45
2. 56 × 7 + 11
= 392 + 11
= 403
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1. (2x - 5) (4 + 5)
= 2x(4 + 5) - 5(4 + 5)
= 8x + 10x - 20 - 25
= 18x - 45
2. 56 × 7 + 11
= 392 + 11
= 403
••