Question

If x = 4, find the value of −3x (−5x+10).

Answer 1

Answer:-

Let,

n(x) = - 3x (- 5x + 10)

= 15x² - 30x

∴ n(4) = 15(4)² - 30(4)

= 15(16) - 120

= 240 - 120

= 120

∴ If x = 4, the value of - 3x (- 5x + 10) is 120.

Answer 2

Given :-

• Equation : -3x (-5x + 10)
• Value of x = 4

To find :-

• Value of -3x (-5x + 10)

According to the question,

➤ -3x (-5x + 10)

Putting the value of x

➤ -3 × 4 (-5 × 4 + 10)

➤ -12 (-20 + 10)

➤ -12 (-10)

➤ 120..

.°. So,the answer is 120...