Question

6. a) Știind că x=4, determinați produsul p= (x + 1). (2x +11)-(3x – 7). b) știind că y=9, determinați produsul p= (y + 5) - (2y – 4) · (3y + 3).​

Answer 1

Răspuns:

P = (4+1)(2×4+11)-(3×4-7)

P = 5×19-5

P = 5(19-1)

P = 5×18

P = 90

P = (9+5)-(2×9-4)(3×9+3)

P = 14-14×30

P = 14(1-30)

P = 14×(-29)

P = (-406)

Answer 2

x = 4

P = (4 + 1) • (2 • 4 + 11) - (3 • 4 - 7)

P = (4 + 1) • (8 + 11) - (12 - 7)

P = 5 • 19 - 5

P = 95 - 5

P = 90

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y = 9

P = (9 + 5) - (2 • 9 - 4) • (3 • 9 + 3)

P = 14 - (18 - 4) • (27 + 3)

P = 14 - 14 • 30

P = 14 - 420

P = - 406