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Sagot :

A=4×1,5²-9-(2×1,5+3)(1,5-1)

= 9-9-(2×1,5+3)(1,5-1)

= (-3-3)(1,5-1)

= -4,5 -4,5 +3 +3

= -9+6

= -3

A= 4×(-4)²-9-(2×(-4)+3)(-4-1)

= 4×16-9-(-8+3)(-4-1)

= 64-9-(-8+3)(-4-1)

= 55+(8-3)(-4-1)

= 55-32-8+12+3

= 30

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