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Free_Kalibri [48]
3 years ago
7

Factorise: a^2 + 8a - 20

Mathematics
2 answers:
REY [17]3 years ago
6 0
Which two numbers add up to <span>88</span><span> and multiply to </span><span>−20?
</span><span>−2</span><span> and </span><span>10
</span>
Rewrite the expression using the above:

Answer:
(a−2)(a+10)<span>
</span>
amm18123 years ago
6 0
You would use the quadratic formula or graph it to find your factors. Your factors are: 

(x+10)(x-2) 
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If the trapezoid on the grid below is translated by using the rule (x,y)-&gt; (x-4,y-3) what will be the coordinates of B’?
vesna_86 [32]

Answer:

B'(3, 5)

Step-by-step explanation:

Rule for the translation of a point (x, y) by 'h' units left and 'k' units upwards,

(x, y) → (x - h, y + k)

If h = 4 and k = 3,

(x, y)\rightarrow(x-4,y+3)

Following this rule coordinates of the image point of B will be,

B(7, 2) → B'(7 - 4, 2 + 3)

           → B'(3, 5)

Therefore, coordinates of the image point B' will be,

B'(3, 5)

6 0
3 years ago
I want help its urgent!!! <br><br>(iv), (v), (vi) Questions​
Artist 52 [7]

Solution:

iv) Given equation: x^{2} - y^{2} - 4x - 2y + 3

Since we are given two variables, we need to split the original expression into two quadratic expressions as

x^{2} - 4x + 4 - y^{2} - 2y - 1

Factoring x first:

x^{2} - 4x + 4 = x^{2} - 2x - 2x + 4

= x (x - 2) - 2 (x-2)

= (x-2)(x-2)

= (x-2)^{2}

Factoring y now:

-y^{2} - 2y - 1 = -1(y^{2} + 2y + 1)

= -1(y^{2} + y + y + 1)

= -1[ y(y+1) + 1(y+1)]

= -1 [(y+1)(y+1)]

= (y+1)(-y-1)

Therefore, the original expression becomes

(x-2)^{2}+(y+1)(-y-1)\\or \\(x-2)(x-2) + (y+1)(-y-1)

7 0
3 years ago
Find the sequence of -1, 1, __, 5, __
marin [14]
The missing numbers are 3, and 7
the pattern is +2 to each number
7 0
3 years ago
B = <br><br> m = <br><br> Equation: y =
Komok [63]

Answer:

..........................................

Step-by-step explanation:

////////////////////////

8 0
3 years ago
The question is:
marishachu [46]

Answer:

That's very simple 2^–1 is equal to 1/2 and 5^0 is equal to 1. Then add this two. 1/2+1 is equal to 1.5.

plz rate me brainiest

5 0
3 years ago
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