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Maths

What are the values of x using the factorization method in 4x^2 - 2x -15=0

You would use the quadratic formula: x = -b +- square root of b^2 - 4ac / 2a ax^2 + bx + c = 0 4x^2 - 2x - 15 = 0 using this we know that a = 4, b = -2 and c = -15 the we substitute those values into the equation on a calculator: x = -(-2) + square root (-2)^2 - 4(4)(-15) / 2(4) x = -(-2) - square root (-2)^2 - 4(4)(-15) / 2(4) this gives x to be x = 1 +- square root 61 / 4 Simran Dhillon
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553 students helped

Maths

Make x the subject of 2y+3=5x-18

x =(2y + 21)/5 Hope this helps! Harry O'Shea
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36 students helped Zayna Ak
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516 students helped

Maths

Express 24 as a product of its prime factors

*2*x12 *3*x4 *2*x*2* 24=2x2x2x3

Muhammed Cheychi
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226 students helped

Muhammed Cheychi
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226 students helped

Maths

P is the midpoint of AD. AQ:QB=2:3. Show that PQ is parallel to CB

Step-by-step explanation: AB and CD are parallel lines. We are given P and Q are mid point of AD and BC respectively. Line AD and Line BC are segmented equally by line PQ which is drawn between parallel lines AB and CD. Hence lines AB, CD and PQ are parallel to each other. In AABD, PR is the line parallel to AB and passing through the midpoint P of side AD. Hence PR = (1/2)AB…(1) Similarly, in ABC... more Karan Mahendra Jain
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6.3k students helped

Maths

If £2000 is placed into a bank account that pays 3% compound intrest per year, how much will be in the account after 2 years

There are 2 ways we could solve this question. THE LONG WAY: We add 3% to the capital sum (i.e. 2000 pounds) to find how much money we have after 1 year and then add 3% percent to that sum to find how much you have after two years. If the compound interest is 3% then that essentially means that after 1 year you have 103% of the original i.e. we have 100% of the original which is just the value... more Lilli Ganzer
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148 students helped

Maths

A number x rounded to 1 decimal place is 12.3

the error interval for the number is: 12.25<= x < 12.35 Simran Dhillon
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553 students helped

Maths 