Answer:
3.1
Step-by-step explanation:
Permutaions aka slot method
1st slot has 4 possibiliies
2nd slot has 3 since 1 in 1st slot
3rd has 2
multily
4*3*2=24
24 possibilities
456
457
467
465
476
475
546
547
567
564
576
574
647
645
654
657
674
675
745
746
756
754
765
764
Answer:
x=-11
Step-by-step explanation:
Sum of the interior angles of a triangle is 180
(x+51)+60+80=180
(x+51)+140=180
x+51=40
x=-11
Answer:
(2x² + 5x + 2) = (2x + 1)(x +2)
Step-by-step explanation:
Given expression is (2x² + 5x + 2).
We have to factorize the given expression.
(2x²+ 5x + 2) = 2x² + 4x + x + 2
= 2x(x + 2) + 1(x + 2)
= (2x + 1)(x + 2)
So the factored form of the given expression will be (2x + 1)(x + 2).
Answer:
x^2+4x-5
Step-by-step explanation:
(x+2)(x+2)= x^2+2x+2x+4 simplify
x^2+4x+4=-9 add 9 to other side
x^2+4x-5