Question

Oblicz wartość wyrażenia dla a=2 b=-1 c= 1/4
b) a(8c-b) c) 2(a+b)(a-b)c e) 4c + b 10a +15 /5
d) 1/4 (ab+bc+ ac f) (a-2b)(1:c /8

jak nie ma żadnego zanaku to mnożenie

Answer 1

B)
a×(8c-b)= 2×(8×(1/4)-(-1))= 2×(2+1)=2×3=6
c)
2×(2+(-1))(2-(-1))×(1/4)= 2×(1 × 3) × (1/4)= 6 × (1/4)= (3/2)
d)
(1/4)×(2×(-1) + (-1)×(1/4) + 2×(1/4)) = (1/4) × (-2 + (-1/4) + (1/2))= (1/4) × (-1/2)= -(1/8)
f) (2-2×(-1))(1÷((1/4)/8) = (2+2)(1× (8/(1/4))= 4×(1×32)=4×32=128