The ph of a solution is a measure of the quantity of hydrogen atoms (h) in the solution. it is given by the formula f(x) = −log x.

in the formula, x = [h+], the molar concentration of hydrogen atoms, or the number of moles of hydrogen atoms per liter of solution

oven cleaner: [h+] = 10−13 ph =

water: [h+] = 0.7 ph =

blood: [h+] = 0.4 ph =

vinegar: [h+] = 0.0063 ph =

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

a c

step-by-step explanation:

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