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Free_Kalibri [48]

3 years ago

7

Factorise: a^2 + 8a - 20

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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Ratling [72]

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Let the function be f defined by f (x) = 12 - 5x

marissa [1.9K]

(a) No

$f(x) = 12 - 5x$

$f(0) = 12 - 5(0)$

$f(x) = 12 - 0$

$f(x) = 12$

Hence,

f(0) is unequal to 0.

(b)

$f(x) = 12 - 5x$

$f( - 1) = 12 - 5( - 1)$

$f( - 1) = 12 + 5$

$f( - 1) = 17$

(c)

$f(x) = 12 - 5x$

$f(x) = 6$

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7 0

3 years ago

Arrange in order smallest to largest 0.38, 0.31 , 0.4

Aleonysh [2.5K]

Answer:

0.31, 0.38, 0.4

Step-by-step explanation:

I hope it helps

7 0

3 years ago

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Find the next two terms in this sequence 10, 40, 160, __, __

EleoNora [17]

Inbetween each term, you are multiply by 4.

10 x 4 = 40

40 x 4 = 160

160 x 4 = 640

640 x 4 = 2560

Your next numbers are 640 & 2560.

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6 0

3 years ago

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Find all the zeros of the polynomial function. x^3 + 2x^2 -5x-6 f(x) a) (-3) b) (-2, 1, 3 c) (-3, -1, 2) d) -1) e) none

Flauer [41]

Answer:1,2,3

Step-by-step explanation:

F(x)= $x^{3}$ +2 $x^2$ - $5x$ - $6$ =0

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$x^{3}$ + $x^2$ + $x^2$ - $5x-6$ =0

$x^2$ $\left ( x+1\right )$ + $x^2$ -5x-6=0

$x^2$ $\left ( x+1\right )$ + $x^2$ -6x+x-6=0

$x^2$ $\left ( x+1\right )$ + $\left (x-6 \right )$ $\left ( x+1\right )$ =0

$\left ( x+1\right )$ $\left ( x^2+x-6\right )$ =0

$\left ( x+1\right )$ $\left ( x^2+3x-2x-6\right )$ =0

$\left ( x+1\right )$ $\left ( x+3\right )$ $\left ( x-2\right )$ =0

4 0

4 years ago