Tick the correct answer-2 x-52 x-5-a 4 x2-25b 4 x2-25c 4 x2-10 x-25d 4 x2-10 x-25

(b) (4x2 minus; 25) 2x+52x 5 #8658;2x2 52 #160; #160; #160; #160; #160; #160; #160; #160; #160; #160; #160;according #160;to #16 ...

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Byju's Answer

Standard VIII

Physics

Static Friction

Tick the cor...

Question

Tick (✓) the correct answer:
(2x + 5)(2x − 5) = ?
(a) (4x² + 25)
(b) (4x² − 25)
(c) (4x² − 10x + 25)
(d) (4x² + 10x − 25)

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Solution

(b) (4x² − 25)

$(2 x + 5) (2 x - 5) \Rightarrow {(2 x)}^{2} - {(5)}^{2} (according to the formula (a + b) (a - b) = a^{2} - b^{2}) \Rightarrow 4 x^{2} - 25$

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Similar questions

Tick $(✓)$ the correct answer in each of the following:
$(2 x + 5) (2 x - 5) = ?$
(a) $(4 x^{2} + 25)$
(b) $(4 x^{2} - 25)$
(c) $(4 x^{2} - 10 x + 25)$
(d) $(4 x^{2} + 10 x - 25)$

Dividing $4 x^{2} - 10 x + 6$ by $2$ , we get ______.

Q. Solve:-

6 + 10 x + 4 x^{2} = 0

Q. State True or False:
On subtracting

- 3 x^{3} + 4 x^{2} - 5 x + 6

from

3 x^{3} - 4 x^{2} + 5 x - 6

, the answer is

6 x^{3} - 8 x^{2} + 10 x - 12

Q. The rational expression

\frac{8 x^{3} - 125}{4 x^{2} + 10 x + 25}

in its simplest form is

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Tick (✓) the correct answer: (2x + 5)(2x − 5) = ? (a) (4x2 + 25) (b) (4x2 − 25) (c) (4x2 − 10x + 25) (d) (4x2 + 10x − 25)

(b) (4x2 − 25) 2x+52x-5⇒2x2-52 according to the formula a+ba-b = a2-b2⇒4x2 - 25

Tick (✓) the correct answer:
(2x + 5)(2x − 5) = ?
(a) (4x² + 25)
(b) (4x² − 25)
(c) (4x² − 10x + 25)
(d) (4x² + 10x − 25)

(b) (4x² − 25)

$(2 x + 5) (2 x - 5) \Rightarrow {(2 x)}^{2} - {(5)}^{2} (according to the formula (a + b) (a - b) = a^{2} - b^{2}) \Rightarrow 4 x^{2} - 25$